erofs: remove unused trace event erofs_destroy_inode

The trace event `erofs_destroy_inode` was added but remains unused. This
unused event contributes approximately 5KB to the kernel module size.

Reported-by: Steven Rostedt <rostedt@goodmis.org>
Closes: https://lore.kernel.org/r/20250612224906.15000244@batman.local.home
Fixes: 13f06f4 ("staging: erofs: support tracepoint")
Cc: stable@vger.kernel.org
Reviewed-by: Hongbo Li <lihongbo22@huawei.com>
Signed-off-by: Gao Xiang <hsiangkao@linux.alibaba.com>
Link: https://lore.kernel.org/r/20250617054056.3232365-1-hsiangkao@linux.alibaba.com

Author: hsiangkao

include/trace/events/erofs.h

@@ -211,24 +211,6 @@ TRACE_EVENT(erofs_map_blocks_exit,
 		  show_mflags(__entry->mflags), __entry->ret)
 );
 
-TRACE_EVENT(erofs_destroy_inode,
-	TP_PROTO(struct inode *inode),
-
-	TP_ARGS(inode),
-
-	TP_STRUCT__entry(
-		__field(	dev_t,		dev		)
-		__field(	erofs_nid_t,	nid		)
-	),
-
-	TP_fast_assign(
-		__entry->dev	= inode->i_sb->s_dev;
-		__entry->nid	= EROFS_I(inode)->nid;
-	),
-
-	TP_printk("dev = (%d,%d), nid = %llu", show_dev_nid(__entry))
-);
-
 #endif /* _TRACE_EROFS_H */
 
  /* This part must be outside protection */