ntdll: Get rid of the no longer used pthread emulation.

dlls/ntdll/Makefile.in

@@ -31,7 +31,6 @@ C_SRCS = \
 	path.c \
 	printf.c \
 	process.c \
-	pthread.c \
 	reg.c \
 	relay.c \
 	resource.c \

dlls/ntdll/ntdll_misc.h

@@ -62,7 +62,6 @@ extern size_t get_signal_stack_total_size(void);
 extern void version_init( const WCHAR *appname );
 extern void debug_init(void);
 extern HANDLE thread_init(void);
-extern void pthread_init(void);
 extern void actctx_init(void);
 extern void virtual_init(void);
 extern void virtual_init_threading(void);

dlls/ntdll/thread.c

@@ -335,7 +335,6 @@ HANDLE thread_init(void)
     user_shared_data->TickCountLowDeprecated = user_shared_data->u.TickCount.LowPart;
     user_shared_data->TickCountMultiplier = 1 << 24;
 
-    pthread_init();
     return exe_file;
 }