Remove unneeded brackets

allchblk.c

@@ -1009,7 +1009,7 @@ STATIC struct hblk *GC_allochblk_nth(size_t lb_adjusted, int k,
 /* This function is called from the sweeper whenever an object is      */
 /* freed.                                                              */
     GC_ATTR_NOINLINE GC_API void GC_CALL GC_free_profiler_hook(void * p) {
-        GC_noop1((word)(p));
+        GC_noop1((word)p);
     }
 # endif