fixed PY-9496 Don't show warnings about base classes without __init__

PY-9302 Class has no __init__ method: false positive for child class without one

python/src/com/jetbrains/python/inspections/PyClassHasNoInitInspection.java

@@ -53,13 +53,6 @@ public class PyClassHasNoInitInspection extends PyInspection {
         registerProblem(node.getNameIdentifier(), PyBundle.message("INSP.class.has.no.init"),
                         new AddMethodQuickFix("__init__", new PyClassTypeImpl(node, false), false));
       }
-      for (PyClass ancestor : node.getAncestorClasses(myTypeEvalContext)) {
-        final PyFunction ancestorInit = ancestor.findInitOrNew(false);
-        if (ancestorInit == null) {
-          registerProblem(node.getNameIdentifier(), PyBundle.message("INSP.parent.$0.has.no.init", ancestor.getName()),
-                          new AddMethodQuickFix("__init__", new PyClassTypeImpl(ancestor, false), false));
-        }
-      }
     }
   }
 }

python/testData/inspections/PyClassHasNoInitInspection/parentClass.py

@@ -3,7 +3,7 @@ class <weak_warning descr="Class has no __init__ method">A</weak_warning>:
     def foo(self):
         self.b = 1
 
-class <weak_warning descr="Parent 'A' has no __init__ method">B</weak_warning>(A):
+class B(A):
     def __init__(self):
         self.b = 2