DateFormatThreadUnsafe - Remove requirements for final and access modifiers

Author: emilejq

java/ql/src/Likely Bugs/Concurrency/DateFormatThreadUnsafe.ql

@@ -16,8 +16,6 @@ import java
 from Field f, Class dateFormat
 where
   f.isStatic() and
-  f.isFinal() and
-  (f.isPublic() or f.isProtected()) and
   dateFormat.hasQualifiedName("java.text", "DateFormat") and
   f.getType().(RefType).hasSupertype*(dateFormat) and
   exists(MethodAccess m | m.getQualifier().(VarAccess).getVariable() = f)