C++: Consistency.

Author: geoffw0

cpp/ql/src/semmle/code/cpp/models/implementations/Strftime.qll

@@ -10,10 +10,7 @@ class Strftime extends TaintFunction, ArrayFunction {
       input.isParameterDeref(2) or
       input.isParameterDeref(3)
     ) and
-    (
-      output.isParameterDeref(0) or
-      output.isReturnValue()
-    )
+    output.isParameterDeref(0)
   }
 
   override predicate hasArrayWithNullTerminator(int bufParam) { bufParam = 2 }