f2fs: clean up left deprecated IO trace codes

Commit d5f7bc00 ("f2fs: deprecate f2fs_trace_io") left some
dead codes, delete them.
Signed-off-by: Chao Yu <yuchao0@huawei.com>
Signed-off-by: Jaegeuk Kim <jaegeuk@kernel.org>

fs/f2fs/compress.c

@@ -76,12 +76,6 @@ bool f2fs_is_compressed_page(struct page *page)
 		return false;
 	if (IS_ATOMIC_WRITTEN_PAGE(page) || IS_DUMMY_WRITTEN_PAGE(page))
 		return false;
-	/*
-	 * page->private may be set with pid.
-	 * pid_max is enough to check if it is traced.
-	 */
-	if (IS_IO_TRACED_PAGE(page))
-		return false;
 
 	f2fs_bug_on(F2FS_M_SB(page->mapping),
 		*((u32 *)page_private(page)) != F2FS_COMPRESSED_PAGE_MAGIC);

fs/f2fs/f2fs.h

@@ -1303,14 +1303,6 @@ enum {
 #define IS_DUMMY_WRITTEN_PAGE(page)			\
 		(page_private(page) == DUMMY_WRITTEN_PAGE)
 
-#ifdef CONFIG_F2FS_IO_TRACE
-#define IS_IO_TRACED_PAGE(page)			\
-		(page_private(page) > 0 &&		\
-		 page_private(page) < (unsigned long)PID_MAX_LIMIT)
-#else
-#define IS_IO_TRACED_PAGE(page) (0)
-#endif
-
 /* For compression */
 enum compress_algorithm_type {
 	COMPRESS_LZO,