Remove unused ZEND_JIT_IR (#14760)

Symbol was added when PHP-8.3 JIT engine was used with the IR JIT and is
now unused and redundant.

Author: petk

ext/opcache/config.m4

@@ -50,7 +50,6 @@ if test "$PHP_OPCACHE" != "no"; then
 
   if test "$PHP_OPCACHE_JIT" = "yes" ; then
     AC_DEFINE(HAVE_JIT, 1, [Define to enable JIT])
-    AC_DEFINE(ZEND_JIT_IR, 1, [Use JIT IR framework])
     ZEND_JIT_SRC="jit/zend_jit.c jit/zend_jit_vm_helpers.c jit/ir/ir.c jit/ir/ir_strtab.c \
       jit/ir/ir_cfg.c jit/ir/ir_sccp.c jit/ir/ir_gcm.c jit/ir/ir_ra.c jit/ir/ir_save.c \
       jit/ir/ir_dump.c jit/ir/ir_gdb.c jit/ir/ir_perf.c jit/ir/ir_check.c \

ext/opcache/config.w32

@@ -33,7 +33,6 @@ if (PHP_OPCACHE != "no") {
 			DEFINE("DASM_ARCH", "x86");
 
 			AC_DEFINE('HAVE_JIT', 1, 'Define to enable JIT');
-			AC_DEFINE('ZEND_JIT_IR', 1, 'Use JIT IR framework');
 
 			ADD_FLAG("CFLAGS_OPCACHE", "/I \"ext\\opcache\\jit\\ir\" /D "+ir_target+" /D IR_PHP");
 			if (PHP_DEBUG == "yes") {