fs/binfmt_flat.c: remove set but not used variable 'inode'

Fixes gcc '-Wunused-but-set-variable' warning:

  fs/binfmt_flat.c: In function load_flat_file:
  fs/binfmt_flat.c:419:16: warning: variable inode set but not used [-Wunused-but-set-variable]

It's never used and can be removed.

Link: http://lkml.kernel.org/r/20190525125341.9844-1-yuehaibing@huawei.com
Signed-off-by: YueHaibing <yuehaibing@huawei.com>
Cc: Al Viro <viro@zeniv.linux.org.uk>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>

Author: YueHaibing

fs/binfmt_flat.c

@@ -431,15 +431,13 @@ static int load_flat_file(struct linux_binprm *bprm,
 	unsigned long len, memp, memp_size, extra, rlim;
 	__be32 __user *reloc;
 	u32 __user *rp;
-	struct inode *inode;
 	int i, rev, relocs;
 	loff_t fpos;
 	unsigned long start_code, end_code;
 	ssize_t result;
 	int ret;
 
 	hdr = ((struct flat_hdr *) bprm->buf);		/* exec-header */
-	inode = file_inode(bprm->file);
 
 	text_len  = ntohl(hdr->data_start);
 	data_len  = ntohl(hdr->data_end) - ntohl(hdr->data_start);