Stop testing for gid_t and uid_t that we never use in CMake

Also remove the corresponding parts of setup.h.in.

build/cmake/setup.cmake

@@ -650,7 +650,6 @@ endif()
 set(SYSTYPES
     size_t
     wchar_t int long short
-    gid_t uid_t
     )
 if(NOT MSVC)
     list(APPEND SYSTYPES mode_t off_t)

build/cmake/setup.h.in

@@ -17,9 +17,6 @@
 /* the installation location prefix from configure */
 #cmakedefine wxINSTALL_PREFIX "@wxINSTALL_PREFIX@"
 
-/* Define to `int' if <sys/types.h> doesn't define.  */
-#cmakedefine gid_t int
-
 /* Define to `int' if <sys/types.h> doesn't define.  */
 #cmakedefine mode_t int
 
@@ -40,9 +37,6 @@
 #cmakedefine _GNU_SOURCE 1
 #endif
 
-/* Define to `int' if <sys/types.h> doesn't define.  */
-#cmakedefine uid_t int
-
 /* Define if your processor stores words with the most significant
    byte first (like Motorola and SPARC, unlike Intel and VAX).  */
 #cmakedefine WORDS_BIGENDIAN 1