cmFindCommon: Remove MSVC6 workaround for nested struct private access.

Source/cmFindCommon.h

@@ -33,10 +33,6 @@ public:
 protected:
   friend class cmSearchPath;
 
-/* VS6 is broken and can't pass protected class definitions to child classes */
-#if defined(_MSC_VER) && (_MSC_VER < 1300)
-public:
-#endif
   /** Used to define groups of path labels */
   class PathGroup : public cmPathLabel
   {
@@ -61,9 +57,6 @@ public:
     static PathLabel CMakeSystem;
     static PathLabel Guess;
   };
-#if defined(_MSC_VER) && (_MSC_VER < 1300)
-protected:
-#endif
 
   enum RootPathMode { RootPathModeNever,
                       RootPathModeOnly,