cmGeneratorExpression: Inline evaluation helper at only call site

Source/cmGeneratorExpression.cxx

@@ -70,13 +70,6 @@ const std::string& cmCompiledGeneratorExpression::Evaluate(
     currentTarget ? currentTarget : headTarget, this->EvaluateForBuildsystem,
     this->Backtrace, language);
 
-  return this->EvaluateWithContext(context, dagChecker);
-}
-
-const std::string& cmCompiledGeneratorExpression::EvaluateWithContext(
-  cmGeneratorExpressionContext& context,
-  cmGeneratorExpressionDAGChecker* dagChecker) const
-{
   if (!this->NeedsEvaluation) {
     return this->Input;
   }

Source/cmGeneratorExpression.h

@@ -17,7 +17,6 @@
 class cmake;
 class cmCompiledGeneratorExpression;
 class cmGeneratorTarget;
-struct cmGeneratorExpressionContext;
 struct cmGeneratorExpressionDAGChecker;
 struct cmGeneratorExpressionEvaluator;
 
@@ -151,10 +150,6 @@ public:
                               std::map<std::string, std::string>& mapping);
 
 private:
-  const std::string& EvaluateWithContext(
-    cmGeneratorExpressionContext& context,
-    cmGeneratorExpressionDAGChecker* dagChecker) const;
-
   cmCompiledGeneratorExpression(cmake& cmakeInstance,
                                 cmListFileBacktrace backtrace,
                                 std::string input);