IDEA-194439 Regression: Enum.toString() should not be externally annotated as @NotNull

java/java-tests/testData/inspection/nullableProblems/NonAnnotatedSiblingOverriding.java

@@ -23,4 +23,8 @@ interface NonNullEnum {
   String name();
 }
 
-enum NonNullEnumImpl implements NonNullEnum {}
\ No newline at end of file
+enum NonNullEnumImpl implements NonNullEnum { a;
+  public String toString() {
+    return null;
+  }
+}
\ No newline at end of file

java/jdkAnnotations/java/lang/annotations.xml

@@ -86,9 +86,6 @@
     <annotation name='org.jetbrains.annotations.NotNull'/>
   </item>
   <item name='java.lang.Enum java.lang.String name()'>
-        <annotation name='org.jetbrains.annotations.NotNull'/>
-    </item>
-  <item name='java.lang.Enum java.lang.String toString()'>
     <annotation name='org.jetbrains.annotations.NotNull'/>
   </item>
   <item name='java.lang.Integer int bitCount(int)'>