Remove the python3 porting mode from the codebase

It's possible to use the python3 porting checker from
an older pylint version. But it's not evolving anymore
and was costing resource to maintain.

2 files changed, 0 insertions, 50 deletions

diff --git a/pylint/lint/pylinter.py b/pylint/lint/pylinter.py
index 8582f7637..59276a50a 100644
--- a/pylint/lint/pylinter.py
+++ b/pylint/lint/pylinter.py
@@ -536,7 +536,6 @@ class PyLinter(
         )
         self.register_checker(self)
         self._dynamic_plugins = set()
-        self._python3_porting_mode = False
         self._error_mode = False
         self.load_provider_defaults()
         if reporter:
@@ -755,45 +754,10 @@ class PyLinter(
         self._error_mode = True
         self.disable_noerror_messages()
         self.disable("miscellaneous")
-        if self._python3_porting_mode:
-            self.disable("all")
-            for msg_id in self._checker_messages("python3"):
-                if msg_id.startswith("E"):
-                    self.enable(msg_id)
-            config_parser = self.cfgfile_parser
-            if config_parser.has_option("MESSAGES CONTROL", "disable"):
-                value = config_parser.get("MESSAGES CONTROL", "disable")
-                self.global_set_option("disable", value)
-        else:
-            self.disable("python3")
         self.set_option("reports", False)
         self.set_option("persistent", False)
         self.set_option("score", False)
 
-    def python3_porting_mode(self):
-        """Disable all other checkers and enable Python 3 warnings."""
-        self.disable("all")
-        # re-enable some errors, or 'print', 'raise', 'async', 'await' will mistakenly lint fine
-        self.enable("fatal")  # F0001
-        self.enable("astroid-error")  # F0002
-        self.enable("parse-error")  # F0010
-        self.enable("syntax-error")  # E0001
-        self.enable("python3")
-        if self._error_mode:
-            # The error mode was activated, using the -E flag.
-            # So we'll need to enable only the errors from the
-            # Python 3 porting checker.
-            for msg_id in self._checker_messages("python3"):
-                if msg_id.startswith("E"):
-                    self.enable(msg_id)
-                else:
-                    self.disable(msg_id)
-        config_parser = self.cfgfile_parser
-        if config_parser.has_option("MESSAGES CONTROL", "disable"):
-            value = config_parser.get("MESSAGES CONTROL", "disable")
-            self.global_set_option("disable", value)
-        self._python3_porting_mode = True
-
     def list_messages_enabled(self):
         emittable, non_emittable = self.msgs_store.find_emittable_messages()
         enabled = []
diff --git a/pylint/lint/run.py b/pylint/lint/run.py
index ac4f586f4..d84ed2703 100644
--- a/pylint/lint/run.py
+++ b/pylint/lint/run.py
@@ -248,16 +248,6 @@ group are mutually exclusive.",
                     },
                 ),
                 (
-                    "py3k",
-                    {
-                        "action": "callback",
-                        "callback": self.cb_python3_porting_mode,
-                        "help": "In Python 3 porting mode, all checkers will be "
-                        "disabled and only messages emitted by the porting "
-                        "checker will be displayed.",
-                    },
-                ),
-                (
                     "verbose",
                     {
                         "action": "callback",
@@ -469,9 +459,5 @@ group are mutually exclusive.",
             print(check)
         sys.exit(0)
 
-    def cb_python3_porting_mode(self, *args, **kwargs):
-        """Activate only the python3 porting checker."""
-        self.linter.python3_porting_mode()
-
     def cb_verbose_mode(self, *args, **kwargs):
         self.verbose = True