Revert "Make instr() a macro"

This reverts commit fea1d2dd5d210564d442a09fe034b62f262f35f9 due to it
causing problems so close to the release of 5.24.  See
https://rt.perl.org/Ticket/Display.html?id=127852

1 files changed, 0 insertions, 2 deletions

diff --git a/util.h b/util.h
index 3a74bd02bd..3310b119d8 100644
--- a/util.h
+++ b/util.h
@@ -229,8 +229,6 @@ means arg not present, 1 is empty string/null byte */
 #  define HS_CXT cv
 #endif
 
-#define instr(haystack, needle) strstr(haystack, needle)
-
 /*
  * ex: set ts=8 sts=4 sw=4 et:
  */