quota: remove redundant return at end of void function

Function dquot_claim_space_nodirty nad dquot_reclaim_space_nodirty have
no return value, just remove redundant return at end of the functions.

Link: https://patch.msgid.link/20240715130534.2112678-4-shikemeng@huaweicloud.com


Signed-off-by: Kemeng Shi <shikemeng@huaweicloud.com>
Signed-off-by: Jan Kara <jack@suse.cz>