change: ./configure: we no longer need to pass in -msse4.2 with the latest LuaJIT.

util/configure

@@ -739,51 +739,6 @@ _END_
             $luajit_xcflags .= " -DLUAJIT_DISABLE_GC64";
         }
 
-        if (!$user_luajit_xcflags
-            || $user_luajit_xcflags !~ /-msse4\.2\b/)
-        {
-            # check -msse4.2
-            my ($out, $cfile) = tempfile("resty-config-XXXXXX",
-                                         SUFFIX => '.c', TMPDIR => 1,
-                                         UNLINK => 1);
-
-            print $out "
-int main(void) {
-#ifndef __SSE4_2__
-#   error SSE 4.2 not found
-#endif
-    return 0;
-}
-";
-            close $out;
-
-            my $ofile = tmpnam();
-            my $comp = ($cc || 'cc');
-            my $found;
-
-            if (system("$comp -o $ofile -msse4.2 -c $cfile") == 0
-                && -s $ofile)
-            {
-                unlink $ofile;
-
-                if (system("$comp -o $ofile -march=native -c $cfile") == 0
-                    && -s $ofile)
-                {
-                    print "INFO: found -msse4.2 in $comp.\n";
-                    $found = 1;
-                    $luajit_xcflags .= " -msse4.2";
-                }
-            }
-
-            if (-f $ofile) {
-                unlink $ofile;
-            }
-
-            if (!$found) {
-                print "WARNING: -msse4.2 not supported in $comp.\n";
-            }
-        }
-
         if ($platform eq 'macosx') {
             # to work around a bug in the Xcode toolchain in macOS 11.15:
             # https://github.com/openresty/homebrew-brew/issues/10