winpthreads: remove some internal functions from pthread.h

Declarations of the following functions have been removed from pthread.h:

  - _pthread_rel_time_in_ms
  - _pthread_time_in_ms
  - _pthread_time_in_ms_from_timespec

These functions are declared in internal misc.h.

Signed-off-by: Kirill Makurin <maiddaisuki@outlook.com>
Signed-off-by: LIU Hao <lh_mouse@126.com>

mingw-w64-libraries/winpthreads/include/pthread.h

diff --git a/mingw-w64-libraries/winpthreads/include/pthread.h b/mingw-w64-libraries/winpthreads/include/pthread.h
index 7f0be9e..d06c0c8 100644
--- a/mingw-w64-libraries/winpthreads/include/pthread.h
+++ b/mingw-w64-libraries/winpthreads/include/pthread.h
@@ -355,9 +355,6 @@
 WINPTHREAD_API void * pthread_gethandle (pthread_t t);
 WINPTHREAD_API void * pthread_getevent (void);
 
-WINPTHREAD_API unsigned long long _pthread_rel_time_in_ms(const struct timespec *ts);
-WINPTHREAD_API unsigned long long _pthread_time_in_ms(void);
-WINPTHREAD_API unsigned long long _pthread_time_in_ms_from_timespec(const struct timespec *ts);
 WINPTHREAD_API int _pthread_tryjoin (pthread_t t, void **res);
 WINPTHREAD_API int pthread_rwlockattr_destroy(pthread_rwlockattr_t *a);
 WINPTHREAD_API int pthread_rwlockattr_getpshared(pthread_rwlockattr_t *a, int *s);