bsd-user/bsdload.c: Remove write-only id_change variable

On OpenBSD the compiler complains:
bsd-user/bsdload.c:54:17: warning: variable 'id_change' set but not used [-Wunused-but-set-variable]

This is dead code that was originally copied from linux-user.
We fixed this in linux-user in commit 331c23b5 in 2011;
delete the useless code from bsd-user too.
Signed-off-by: NPeter Maydell <peter.maydell@linaro.org>
Reviewed-by: NThomas Huth <thuth@redhat.com>
Message-id: 1500395194-21455-4-git-send-email-peter.maydell@linaro.org

bsd-user/bsdload.c

@@ -20,22 +20,6 @@ abi_long memcpy_to_target(abi_ulong dest, const void *src,
     return 0;
 }
 
-static int in_group_p(gid_t g)
-{
-    /* return TRUE if we're in the specified group, FALSE otherwise */
-    int         ngroup;
-    int         i;
-    gid_t       grouplist[TARGET_NGROUPS];
-
-    ngroup = getgroups(TARGET_NGROUPS, grouplist);
-    for(i = 0; i < ngroup; i++) {
-        if(grouplist[i] == g) {
-            return 1;
-        }
-    }
-    return 0;
-}
-
 static int count(char ** vec)
 {
     int         i;
@@ -51,7 +35,7 @@ static int prepare_binprm(struct linux_binprm *bprm)
 {
     struct stat         st;
     int mode;
-    int retval, id_change;
+    int retval;
 
     if(fstat(bprm->fd, &st) < 0) {
         return(-errno);
@@ -67,14 +51,10 @@ static int prepare_binprm(struct linux_binprm *bprm)
 
     bprm->e_uid = geteuid();
     bprm->e_gid = getegid();
-    id_change = 0;
 
     /* Set-uid? */
     if(mode & S_ISUID) {
         bprm->e_uid = st.st_uid;
-        if(bprm->e_uid != geteuid()) {
-            id_change = 1;
-        }
     }
 
     /* Set-gid? */
@@ -85,9 +65,6 @@ static int prepare_binprm(struct linux_binprm *bprm)
      */
     if ((mode & (S_ISGID | S_IXGRP)) == (S_ISGID | S_IXGRP)) {
         bprm->e_gid = st.st_gid;
-        if (!in_group_p(bprm->e_gid)) {
-                id_change = 1;
-        }
     }
 
     memset(bprm->buf, 0, sizeof(bprm->buf));