Remove usage of no longer needed compat code

Change-Id: I3180931673496260614e69e95f7da09d68b51714

4 files changed, 5 insertions, 14 deletions

diff --git a/alembic/util/compat.py b/alembic/util/compat.py
index 48218ab..54420cb 100644
--- a/alembic/util/compat.py
+++ b/alembic/util/compat.py
@@ -12,10 +12,6 @@ py39 = sys.version_info >= (3, 9)
 py38 = sys.version_info >= (3, 8)
 py37 = sys.version_info >= (3, 7)
 
-string_types = (str,)
-binary_type = bytes
-text_type = str
-
 
 # produce a wrapper that allows encoded text to stream
 # into a given buffer, but doesn't close it.
diff --git a/alembic/util/langhelpers.py b/alembic/util/langhelpers.py
index 4db9a5f..fd7ccb8 100644
--- a/alembic/util/langhelpers.py
+++ b/alembic/util/langhelpers.py
@@ -21,7 +21,6 @@ from sqlalchemy.util import to_list  # noqa
 from sqlalchemy.util import unique_list  # noqa
 
 from .compat import inspect_getfullargspec
-from .compat import string_types
 
 
 _T = TypeVar("_T")
@@ -209,7 +208,7 @@ def to_tuple(x: Any, default: Optional[tuple] = None) -> tuple:
 def to_tuple(x, default=None):
     if x is None:
         return default
-    elif isinstance(x, string_types):
+    elif isinstance(x, str):
         return (x,)
     elif isinstance(x, Iterable):
         return tuple(x)
@@ -241,7 +240,7 @@ class Dispatcher:
 
     def dispatch(self, obj: Any, qualifier: str = "default") -> Any:
 
-        if isinstance(obj, string_types):
+        if isinstance(obj, str):
             targets: Sequence = [obj]
         elif isinstance(obj, type):
             targets = obj.__mro__
diff --git a/alembic/util/messaging.py b/alembic/util/messaging.py
index 062890a..66f8cc2 100644
--- a/alembic/util/messaging.py
+++ b/alembic/util/messaging.py
@@ -12,8 +12,6 @@ import warnings
 from sqlalchemy.engine import url
 
 from . import sqla_compat
-from .compat import binary_type
-from .compat import string_types
 
 log = logging.getLogger(__name__)
 
@@ -37,7 +35,7 @@ except (ImportError, IOError):
 def write_outstream(stream: TextIO, *text) -> None:
     encoding = getattr(stream, "encoding", "ascii") or "ascii"
     for t in text:
-        if not isinstance(t, binary_type):
+        if not isinstance(t, bytes):
             t = t.encode(encoding, "replace")
         t = t.decode(encoding)
         try:
@@ -100,7 +98,7 @@ def msg(msg: str, newline: bool = True, flush: bool = False) -> None:
 def format_as_comma(value: Optional[Union[str, "Iterable[str]"]]) -> str:
     if value is None:
         return ""
-    elif isinstance(value, string_types):
+    elif isinstance(value, str):
         return value
     elif isinstance(value, Iterable):
         return ", ".join(value)
diff --git a/alembic/util/sqla_compat.py b/alembic/util/sqla_compat.py
index 221e20e..4d0041e 100644
--- a/alembic/util/sqla_compat.py
+++ b/alembic/util/sqla_compat.py
@@ -23,8 +23,6 @@ from sqlalchemy.sql.elements import quoted_name
 from sqlalchemy.sql.elements import TextClause
 from sqlalchemy.sql.visitors import traverse
 
-from . import compat
-
 if TYPE_CHECKING:
     from sqlalchemy import Index
     from sqlalchemy import Table
@@ -338,7 +336,7 @@ def _textual_index_column(
     table: "Table", text_: Union[str, "TextClause", "ColumnElement"]
 ) -> Union["ColumnElement", "Column"]:
     """a workaround for the Index construct's severe lack of flexibility"""
-    if isinstance(text_, compat.string_types):
+    if isinstance(text_, str):
         c = Column(text_, sqltypes.NULLTYPE)
         table.append_column(c)
         return c