more spinlock cleanup

src/std/thread.c

@@ -31,20 +31,12 @@ struct _hl_tls {
 	void *value;
 };
 
-struct _hl_spinlock {
-	void *value;
-};
-
 #elif defined(HL_WIN)
 
 struct _hl_mutex {
 	CRITICAL_SECTION cs;
 };
 
-struct _hl_spinlock {
-	void *value;
-};
-
 #else
 
 #	include <pthread.h>
@@ -59,11 +51,6 @@ struct _hl_tls {
 	pthread_key_t key;
 };
 
-struct _hl_spinlock {
-	pthread_mutex_t lock;
-	void *value;
-};
-
 #endif
 
 // ----------------- ALLOC