remove useless code

mypy/constraints.py

@@ -17,9 +17,6 @@
     CONTRAVARIANT,
     COVARIANT,
     ArgKind,
-    Block,
-    ClassDef,
-    SymbolTable,
     TypeInfo,
 )
 from mypy.types import (
@@ -1336,40 +1333,6 @@ def visit_type_type(self, template: TypeType) -> list[Constraint]:
         else:
             return []
 
-    def _make_type_info(
-        self,
-        name: str,
-        module_name: str | None = None,
-        mro: list[TypeInfo] | None = None,
-        bases: list[Instance] | None = None,
-    ) -> TypeInfo:
-        """Make a TypeInfo suitable for use in unit tests."""
-
-        class_def = ClassDef(name, Block([]), None, [])
-        class_def.fullname = name
-
-        if module_name is None:
-            if "." in name:
-                module_name = name.rsplit(".", 1)[0]
-            else:
-                module_name = "__main__"
-
-        info = TypeInfo(SymbolTable(), class_def, module_name)
-        if mro is None:
-            mro = []
-            if name != "builtins.object":
-                mro.append(self.oi)
-        info.mro = [info] + mro
-        if bases is None:
-            if mro:
-                # By default, assume that there is a single non-generic base.
-                bases = [Instance(mro[0], [])]
-            else:
-                bases = []
-        info.bases = bases
-
-        return info
-
 
 def neg_op(op: int) -> int:
     """Map SubtypeOf to SupertypeOf and vice versa."""