Remove unused structure field in the test

Author: spavloff

clang/test/SemaCXX/noreturn-weverything.c

@@ -3,7 +3,6 @@
 void free(void *);
 typedef void (*set_free_func)(void *);
 struct Method {
-  set_free_func free;
   int nparams;
   int *param;
 };