fuse: removed unused function fuse_uring_create() from header

Function fuse_uring_create() is used only from dev_uring.c and does not
need to be exposed in the header file.  Furthermore, it has the wrong
signature.

While there, also remove the 'struct fuse_ring' forward declaration.

Signed-off-by: Luis Henriques <luis@igalia.com>
Reviewed-by: Bernd Schubert <bschubert@ddn.com>
Signed-off-by: Miklos Szeredi <mszeredi@redhat.com>

Author: luis-henrix

fs/fuse/dev_uring_i.h

@@ -173,12 +173,6 @@ static inline bool fuse_uring_ready(struct fuse_conn *fc)
 
 #else /* CONFIG_FUSE_IO_URING */
 
-struct fuse_ring;
-
-static inline void fuse_uring_create(struct fuse_conn *fc)
-{
-}
-
 static inline void fuse_uring_destruct(struct fuse_conn *fc)
 {
 }