cmCommand: remove unused methods from interface and all implementations

Source/cmFunctionCommand.cxx

@@ -20,11 +20,6 @@ public:
   ///! clean up any memory allocated by the function
   ~cmFunctionHelperCommand() CM_OVERRIDE {}
 
-  /**
-   * This determines if the command is defined in a cmake script.
-   */
-  bool IsUserDefined() const CM_OVERRIDE { return true; }
-
   /**
    * This is a virtual constructor for the command.
    */
@@ -52,11 +47,6 @@ public:
     return false;
   }
 
-  /**
-   * The name of the command as specified in CMakeList.txt.
-   */
-  std::string GetName() const CM_OVERRIDE { return this->Args[0]; }
-
   std::vector<std::string> Args;
   std::vector<cmListFileFunction> Functions;
   cmPolicies::PolicyMap Policies;