fsnotify: Remove proc_fs.h include

proc_fs.h was already included in fdinfo.h

Link: https://lore.kernel.org/r/20200512181906.405927-1-fabf@skynet.be


Signed-off-by: Fabian Frederick <fabf@skynet.be>
Reviewed-by: Amir Goldstein <amir73il@gmail.com>
Signed-off-by: Jan Kara <jack@suse.cz>