ext4: remove unused ext4_{set}/{clear}_bit_atomic

Remove ext4_set_bit_atomic and ext4_clear_bit_atomic which are defined but not
used.
Signed-off-by: Kemeng Shi <shikemeng@huaweicloud.com>
Reviewed-by: Ritesh Harjani (IBM) <ritesh.list@gmail.com>
Link: https://lore.kernel.org/r/20230801143204.2284343-8-shikemeng@huaweicloud.comSigned-off-by: Theodore Ts'o <tytso@mit.edu>

fs/ext4/ext4.h

@@ -1250,10 +1250,8 @@ struct ext4_inode_info {
 
 #define ext4_test_and_set_bit		__test_and_set_bit_le
 #define ext4_set_bit			__set_bit_le
-#define ext4_set_bit_atomic		ext2_set_bit_atomic
 #define ext4_test_and_clear_bit		__test_and_clear_bit_le
 #define ext4_clear_bit			__clear_bit_le
-#define ext4_clear_bit_atomic		ext2_clear_bit_atomic
 #define ext4_test_bit			test_bit_le
 #define ext4_find_next_zero_bit		find_next_zero_bit_le
 #define ext4_find_next_bit		find_next_bit_le