Some code cleanup.

src/kern/linux/linux.hh:
src/kern/solaris/solaris.hh:
    Some code cleanup. Uncommented some typedefs.
src/kern/tru64/tru64.hh:
    Some code cleanup. Deleted an obsoleted function.

--HG--
extra : convert_revision : b165fd43b9c3113d717b6ac9b02593fd750580b0

src/kern/linux/linux.hh

@@ -54,11 +54,11 @@ class Linux : public OperatingSystem
 
     //@{
     /// Basic Linux types.
-/*    typedef uint64_t size_t;
+    typedef uint64_t size_t;
     typedef uint64_t off_t;
     typedef int64_t time_t;
     typedef uint32_t uid_t;
-    typedef uint32_t gid_t;*/
+    typedef uint32_t gid_t;
     //@}
 
     /// Stat buffer.  Note that we can't call it 'stat' since that