btrfs: qgroup: remove one-time use variables for quota_root checks
Remove some variables that are set only to be checked later, and never used. Reviewed-by: Qu Wenruo <wqu@suse.com> Signed-off-by: Marcos Paulo de Souza <mpdesouza@suse.com> Reviewed-by: David Sterba <dsterba@suse.com> Signed-off-by: David Sterba <dsterba@suse.com>
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