STYLE: Fixed line-too-long warning.

Source/cmRemoveCommand.h

@@ -73,7 +73,7 @@ public:
       "(e.g. semicolon separated list).  VALUE is expanded.";
     }
   
-  /** This command is only kept for compatibility with older CMake versions. */
+  /** This command is kept for compatibility with older CMake versions. */
   virtual bool IsDiscouraged()
     {
     return true;