diff --git a/mypy/checker.py b/mypy/checker.py
index 7a5f2f9810e4..9c10cd2fc30d 100644
--- a/mypy/checker.py
+++ b/mypy/checker.py
@@ -1494,9 +1494,6 @@ def is_unannotated_any(t: Type) -> bool:
         show_untyped = not self.is_typeshed_stub or self.options.warn_incomplete_stub
         check_incomplete_defs = self.options.disallow_incomplete_defs and has_explicit_annotation
         if show_untyped and (self.options.disallow_untyped_defs or check_incomplete_defs):
-            # TODO: changing end line and column here changes this information for the node itself
-            # fdef.end_line = fdef.line
-            # fdef.end_column = fdef.column + 1
             if fdef.type is None and self.options.disallow_untyped_defs:
                 if not fdef.arguments or (
                     len(fdef.arguments) == 1
diff --git a/mypy/fastparse.py b/mypy/fastparse.py
index 94b5718fded2..8e482c7c84f2 100644
--- a/mypy/fastparse.py
+++ b/mypy/fastparse.py
@@ -979,22 +979,21 @@ def do_func_def(
                     _dummy_fallback,
                 )
 
-        # End position is always the same.
         end_line = getattr(n, "end_lineno", None)
         end_column = getattr(n, "end_col_offset", None)
 
-        # Determine end of the function definition itself
-        # Fall back to the end of the function definition including its body
+        # End line and column span the whole function including its body.
+        # Determine end of the function definition itself.
+        # Fall back to the end of the function definition including its body.
         def_end_line: int | None = n.lineno
-        # TODO: to go to the end of the function name: n.col_offset + 4 + len(n.name)
         def_end_column: int | None = n.col_offset
 
         returns = n.returns
-        # use the return type hint if defined
+        # Use the return type hint if defined.
         if returns is not None:
             def_end_line = returns.end_lineno
             def_end_column = returns.end_col_offset
-        # otherwise use the last argument in the function definition
+        # Otherwise use the last argument in the function definition.
         elif len(args) > 0:
             last_arg = args[-1]
             initializer = last_arg.initializer
diff --git a/mypy/messages.py b/mypy/messages.py
index 2f4fda54d2ee..2532467b86bf 100644
--- a/mypy/messages.py
+++ b/mypy/messages.py
@@ -259,9 +259,7 @@ def span_from_context(ctx: Context) -> Iterable[int]:
         end_line = context.end_line if context else -1
         end_column = context.end_column if context else -1
 
-        # set end line and column to same as start of context for function definitions
-        # this avoids errors being reported in IDEs for the whole function
-        # TODO: figure out if it's possible to find the end of the function definition line
+        # FuncDef's end includes the body, use the def's end information if available.
         if isinstance(context, FuncDef):
             end_line = context.def_end_line
             # column is 1-based, see also format_messages in errors.py