xfs: remove unused trace event xfs_reflink_cow_enospc

The call to the event xfs_reflink_cow_enospc was removed when the COW
handling was merged into xfs_file_iomap_begin_delay, but the trace event
itself was not. Remove it.

Fixes: db46e60 ("xfs: merge COW handling into xfs_file_iomap_begin_delay")
Signed-off-by: Steven Rostedt (Google) <rostedt@goodmis.org>
Reviewed-by: Christoph Hellwig <hch@lst.de>
Reviewed-by: Darrick J. Wong <djwong@kernel.org>
Signed-off-by: Carlos Maiolino <cem@kernel.org>

Author: rostedt

fs/xfs/xfs_trace.h

@@ -4181,7 +4181,6 @@ DEFINE_INODE_ERROR_EVENT(xfs_reflink_unshare_error);
 /* copy on write */
 DEFINE_INODE_IREC_EVENT(xfs_reflink_trim_around_shared);
 DEFINE_INODE_IREC_EVENT(xfs_reflink_cow_found);
-DEFINE_INODE_IREC_EVENT(xfs_reflink_cow_enospc);
 DEFINE_INODE_IREC_EVENT(xfs_reflink_convert_cow);
 
 DEFINE_SIMPLE_IO_EVENT(xfs_reflink_cancel_cow_range);