Remove script class checks when getting function signature

modules/gdscript/tests/scripts/parser/features/super_class_check.gd

@@ -0,0 +1,13 @@
+# https://github.com/godotengine/godot/issues/71994
+
+func test():
+	pass
+
+class A extends RefCounted:
+	pass
+
+class B extends A:
+	# Parsing `duplicate()` here would throw this error:
+	# Parse Error: The function signature doesn't match the parent. Parent signature is "duplicate(bool = default) -> Resource".
+	func duplicate():
+		pass

modules/gdscript/tests/scripts/parser/features/super_class_check.out

@@ -0,0 +1 @@
+GDTEST_OK