1 files changed, 0 insertions, 7 deletions
diff --git a/sv.h b/sv.h
index f35049862a..0e125543ef 100644
--- a/sv.h
+++ b/sv.h
@@ -1066,10 +1066,3 @@ Release the internal mutex for an SV.
 #define SvGROW(sv,len) (SvLEN(sv) < (len) ? sv_grow(sv,len) : SvPVX(sv))
 #define Sv_Grow sv_grow
 
-#ifdef USE_THREADS
-#   define FDPID_LOCK		MUTEX_LOCK(&PL_fdpid_mutex)
-#   define FDPID_UNLOCK		MUTEX_UNLOCK(&PL_fdpid_mutex)
-#else
-#   define FDPID_LOCK
-#   define FDPID_UNLOCK
-#endif