Remove unused Mach-O test source; test is a dash script

tests/test.c

@@ -1,8 +0,0 @@
-#include <stdio.h>
-#include <unistd.h>
-
-int main(void) {
-    printf("worse_query test executable OK\n");
-    printf("uid=%d euid=%d gid=%d\n", getuid(), geteuid(), getgid());
-    return 0;
-}