xfs: remove unused event xfs_alloc_near_nominleft

xfs: remove unused event xfs_alloc_near_nominleft

When the function xfs_alloc_space_available() was restructured, it removed
the only calls to the trace event xfs_alloc_near_nominleft. As trace
events take up to 5K of memory for text and meta data for each event, they
should not be created when not used. Remove this unused event.

Fixes: 54fee133ad59 ("xfs: adjust allocation length in xfs_alloc_space_available")
Reviewed-by: Christoph Hellwig <hch@lst.de>
Signed-off-by: Steven Rostedt (Google) <rostedt@goodmis.org>
Signed-off-by: Carlos Maiolino <cem@kernel.org>