cmake: remove unused header check

CMakeLists.txt

@@ -108,7 +108,6 @@ check_include_file_cxx (strings.h HAVE_STRINGS_H)
 check_include_file_cxx (sys/stat.h HAVE_SYS_STAT_H)
 check_include_file_cxx (sys/syscall.h HAVE_SYS_SYSCALL_H)
 check_include_file_cxx (sys/time.h HAVE_SYS_TIME_H)
-check_include_file_cxx (sys/types.h HAVE_SYS_TYPES_H)
 check_include_file_cxx (sys/utsname.h HAVE_SYS_UTSNAME_H)
 check_include_file_cxx (sys/wait.h HAVE_SYS_WAIT_H)
 check_include_file_cxx (syscall.h HAVE_SYSCALL_H)
@@ -265,12 +264,6 @@ else (HAVE_LIB_GFLAGS)
   set (ac_cv_have_libgflags 0)
 endif (HAVE_LIB_GFLAGS)
 
-if (HAVE_SYS_TYPES_H)
-  set (ac_cv_have_systypes_h 1)
-else (HAVE_SYS_TYPES_H)
-  set (ac_cv_have_systypes_h 0)
-endif (HAVE_SYS_TYPES_H)
-
 if (HAVE_SSIZE_T)
   set (ac_cv_have_ssize_t 1)
 else (HAVE_SSIZE_T)

src/config.h.cmake.in

@@ -85,9 +85,6 @@
 /* Define to 1 if you have the <sys/time.h> header file. */
 #cmakedefine HAVE_SYS_TIME_H
 
-/* Define to 1 if you have the <sys/types.h> header file. */
-#cmakedefine HAVE_SYS_TYPES_H ${HAVE_SYS_TYPES_H}
-
 /* Define to 1 if you have the <sys/ucontext.h> header file. */
 #cmakedefine HAVE_SYS_UCONTEXT_H
 

src/glog/logging.h.in

@@ -84,9 +84,6 @@
 // that's because they were constructed that way at ./configure time.
 // Look at logging.h.in to see how they're calculated (based on your config).
 #include <cstdint>  // the normal place uint16_t is defined
-#if @ac_cv_have_systypes_h@
-#include <sys/types.h>          // the normal place u_int16_t is defined
-#endif
 
 #if @ac_cv_have_libgflags@
 #include <gflags/gflags.h>