LU-13557 quota: remove inline declarations

LU-13557 quota: remove inline declarations

which can't be really used given function budies aren't in .h file

Fixes: 09f9fb3211 ("LU-11023 quota: quota pools for OSTs")
Signed-off-by: Alex Zhuravlev <bzzz@whamcloud.com>
Change-Id: Ia8bb5d04185ec6a779c872a9825c23034030e605
Reviewed-on: https://review.whamcloud.com/38595
Reviewed-by: Andreas Dilger <adilger@whamcloud.com>
Reviewed-by: James Simmons <jsimmons@infradead.org>
Tested-by: jenkins <devops@whamcloud.com>
Reviewed-by: Neil Brown <neilb@suse.de>
Tested-by: Maloo <maloo@whamcloud.com>
Reviewed-by: Sergey Cheremencev <sergey.cheremencev@hpe.com>
Reviewed-by: Oleg Drokin <green@whamcloud.com>