Remove remaining code parts related to __implements__ (#8414)

Refs #8404 

9 files changed, 7 insertions, 43 deletions

diff --git a/pylint/pyreverse/diagrams.py b/pylint/pyreverse/diagrams.py
index 54b138752..1f76b29ce 100644
--- a/pylint/pyreverse/diagrams.py
+++ b/pylint/pyreverse/diagrams.py
@@ -13,7 +13,7 @@ import astroid
 from astroid import nodes, util
 
 from pylint.checkers.utils import decorated_with_property
-from pylint.pyreverse.utils import FilterMixIn, is_interface
+from pylint.pyreverse.utils import FilterMixIn
 
 
 class Figure:
@@ -195,11 +195,7 @@ class ClassDiagram(Figure, FilterMixIn):
             node = obj.node
             obj.attrs = self.get_attrs(node)
             obj.methods = self.get_methods(node)
-            # shape
-            if is_interface(node):
-                obj.shape = "interface"
-            else:
-                obj.shape = "class"
+            obj.shape = "class"
             # inheritance link
             for par_node in node.ancestors(recurs=False):
                 try:
diff --git a/pylint/pyreverse/dot_printer.py b/pylint/pyreverse/dot_printer.py
index 077e0552d..381c7b69f 100644
--- a/pylint/pyreverse/dot_printer.py
+++ b/pylint/pyreverse/dot_printer.py
@@ -25,13 +25,11 @@ class HTMLLabels(Enum):
 ALLOWED_CHARSETS: frozenset[str] = frozenset(("utf-8", "iso-8859-1", "latin1"))
 SHAPES: dict[NodeType, str] = {
     NodeType.PACKAGE: "box",
-    NodeType.INTERFACE: "record",
     NodeType.CLASS: "record",
 }
 # pylint: disable-next=consider-using-namedtuple-or-dataclass
 ARROWS: dict[EdgeType, dict[str, str]] = {
     EdgeType.INHERITS: {"arrowtail": "none", "arrowhead": "empty"},
-    EdgeType.IMPLEMENTS: {"arrowtail": "node", "arrowhead": "empty", "style": "dashed"},
     EdgeType.ASSOCIATION: {
         "fontcolor": "green",
         "arrowtail": "none",
diff --git a/pylint/pyreverse/inspector.py b/pylint/pyreverse/inspector.py
index aa52845b4..f36816c97 100644
--- a/pylint/pyreverse/inspector.py
+++ b/pylint/pyreverse/inspector.py
@@ -106,9 +106,6 @@ class Linker(IdGeneratorMixIn, utils.LocalsVisitor):
 
     * aggregations_type
       as instance_attrs_type but for aggregations relationships
-
-    * implements,
-      list of implemented interface _objects_ (only on astroid.Class nodes)
     """
 
     def __init__(self, project: Project, tag: bool = False) -> None:
@@ -149,7 +146,6 @@ class Linker(IdGeneratorMixIn, utils.LocalsVisitor):
         """Visit an astroid.Class node.
 
         * set the locals_type and instance_attrs_type mappings
-        * set the implements list and build it
         * optionally tag the node with a unique id
         """
         if hasattr(node, "locals_type"):
diff --git a/pylint/pyreverse/mermaidjs_printer.py b/pylint/pyreverse/mermaidjs_printer.py
index a8f3c576b..37a52f6d3 100644
--- a/pylint/pyreverse/mermaidjs_printer.py
+++ b/pylint/pyreverse/mermaidjs_printer.py
@@ -17,12 +17,10 @@ class MermaidJSPrinter(Printer):
 
     NODES: dict[NodeType, str] = {
         NodeType.CLASS: "class",
-        NodeType.INTERFACE: "class",
         NodeType.PACKAGE: "class",
     }
     ARROWS: dict[EdgeType, str] = {
         EdgeType.INHERITS: "--|>",
-        EdgeType.IMPLEMENTS: "..|>",
         EdgeType.ASSOCIATION: "--*",
         EdgeType.AGGREGATION: "--o",
         EdgeType.USES: "-->",
@@ -46,7 +44,6 @@ class MermaidJSPrinter(Printer):
         # pylint: disable=duplicate-code
         if properties is None:
             properties = NodeProperties(label=name)
-        stereotype = "~~Interface~~" if type_ is NodeType.INTERFACE else ""
         nodetype = self.NODES[type_]
         body = []
         if properties.attrs:
@@ -60,7 +57,7 @@ class MermaidJSPrinter(Printer):
                     line += f" {get_annotation_label(func.returns)}"
                 body.append(line)
         name = name.split(".")[-1]
-        self.emit(f"{nodetype} {name}{stereotype} {{")
+        self.emit(f"{nodetype} {name} {{")
         self._inc_indent()
         for line in body:
             self.emit(line)
diff --git a/pylint/pyreverse/plantuml_printer.py b/pylint/pyreverse/plantuml_printer.py
index de3f983b7..73c9b2640 100644
--- a/pylint/pyreverse/plantuml_printer.py
+++ b/pylint/pyreverse/plantuml_printer.py
@@ -17,12 +17,10 @@ class PlantUmlPrinter(Printer):
 
     NODES: dict[NodeType, str] = {
         NodeType.CLASS: "class",
-        NodeType.INTERFACE: "class",
         NodeType.PACKAGE: "package",
     }
     ARROWS: dict[EdgeType, str] = {
         EdgeType.INHERITS: "--|>",
-        EdgeType.IMPLEMENTS: "..|>",
         EdgeType.ASSOCIATION: "--*",
         EdgeType.AGGREGATION: "--o",
         EdgeType.USES: "-->",
@@ -56,7 +54,6 @@ class PlantUmlPrinter(Printer):
         """
         if properties is None:
             properties = NodeProperties(label=name)
-        stereotype = " << interface >>" if type_ is NodeType.INTERFACE else ""
         nodetype = self.NODES[type_]
         if properties.color and properties.color != self.DEFAULT_COLOR:
             color = f" #{properties.color}"
@@ -76,7 +73,7 @@ class PlantUmlPrinter(Printer):
         label = properties.label if properties.label is not None else name
         if properties.fontcolor and properties.fontcolor != self.DEFAULT_COLOR:
             label = f"<color:{properties.fontcolor}>{label}</color>"
-        self.emit(f'{nodetype} "{label}" as {name}{stereotype}{color} {{')
+        self.emit(f'{nodetype} "{label}" as {name}{color} {{')
         self._inc_indent()
         for line in body:
             self.emit(line)
diff --git a/pylint/pyreverse/printer.py b/pylint/pyreverse/printer.py
index cdbf7e3c8..45b06f5c2 100644
--- a/pylint/pyreverse/printer.py
+++ b/pylint/pyreverse/printer.py
@@ -17,13 +17,11 @@ from pylint.pyreverse.utils import get_annotation_label
 
 class NodeType(Enum):
     CLASS = "class"
-    INTERFACE = "interface"
     PACKAGE = "package"
 
 
 class EdgeType(Enum):
     INHERITS = "inherits"
-    IMPLEMENTS = "implements"
     ASSOCIATION = "association"
     AGGREGATION = "aggregation"
     USES = "uses"
diff --git a/pylint/pyreverse/utils.py b/pylint/pyreverse/utils.py
index 078bc1b7e..d1aad2a03 100644
--- a/pylint/pyreverse/utils.py
+++ b/pylint/pyreverse/utils.py
@@ -72,11 +72,6 @@ def get_visibility(name: str) -> str:
     return visibility
 
 
-def is_interface(node: nodes.ClassDef) -> bool:
-    # bw compatibility
-    return node.type == "interface"  # type: ignore[no-any-return]
-
-
 def is_exception(node: nodes.ClassDef) -> bool:
     # bw compatibility
     return node.type == "exception"  # type: ignore[no-any-return]
diff --git a/pylint/pyreverse/vcg_printer.py b/pylint/pyreverse/vcg_printer.py
index b9e2e94f3..2a2591265 100644
--- a/pylint/pyreverse/vcg_printer.py
+++ b/pylint/pyreverse/vcg_printer.py
@@ -152,7 +152,6 @@ EDGE_ATTRS = {
 SHAPES: dict[NodeType, str] = {
     NodeType.PACKAGE: "box",
     NodeType.CLASS: "box",
-    NodeType.INTERFACE: "ellipse",
 }
 # pylint: disable-next=consider-using-namedtuple-or-dataclass
 ARROWS: dict[EdgeType, dict[str, str | int]] = {
@@ -166,12 +165,6 @@ ARROWS: dict[EdgeType, dict[str, str | int]] = {
         "backarrowstyle": "none",
         "backarrowsize": 10,
     },
-    EdgeType.IMPLEMENTS: {
-        "arrowstyle": "solid",
-        "backarrowstyle": "none",
-        "linestyle": "dotted",
-        "backarrowsize": 10,
-    },
     EdgeType.ASSOCIATION: {
         "arrowstyle": "solid",
         "backarrowstyle": "none",
diff --git a/pylint/pyreverse/writer.py b/pylint/pyreverse/writer.py
index 3d0a4613a..a8b1143fd 100644
--- a/pylint/pyreverse/writer.py
+++ b/pylint/pyreverse/writer.py
@@ -75,9 +75,10 @@ class DiagramWriter:
         # sorted to get predictable (hence testable) results
         for obj in sorted(diagram.objects, key=lambda x: x.title):  # type: ignore[no-any-return]
             obj.fig_id = obj.node.qname()
-            type_ = NodeType.INTERFACE if obj.shape == "interface" else NodeType.CLASS
             self.printer.emit_node(
-                obj.fig_id, type_=type_, properties=self.get_class_properties(obj)
+                obj.fig_id,
+                type_=NodeType.CLASS,
+                properties=self.get_class_properties(obj),
             )
         # inheritance links
         for rel in diagram.get_relationships("specialization"):
@@ -86,13 +87,6 @@ class DiagramWriter:
                 rel.to_object.fig_id,
                 type_=EdgeType.INHERITS,
             )
-        # implementation links
-        for rel in diagram.get_relationships("implements"):
-            self.printer.emit_edge(
-                rel.from_object.fig_id,
-                rel.to_object.fig_id,
-                type_=EdgeType.IMPLEMENTS,
-            )
         # generate associations
         for rel in diagram.get_relationships("association"):
             self.printer.emit_edge(