Btrfs: cleanup the comment for clear_state_bit in extent_io.c
Btrfs: cleanup the comment for clear_state_bit in extent_io.c

No 'delete' arg is used for clear_state_bit.
Cleanup the comment.

Signed-off-by: Wang Sheng-Hui <bb485778c59c959c620dcf404550d8d7642fd953@gmail.com>

TeamVee-Kanas/android_kernel_samsung_kanas,KristFoundation/Programs,KristFoundation/Programs,TeamVee-Kanas/android_kernel_samsung_kanas,KristFoundation/Programs,TeamVee-Kanas/android_kernel_samsung_kanas,KristFoundation/Programs,KristFoundation/Programs,TeamVee-Kanas/android_kernel_samsung_kanas,KristFoundation/Programs,TeamVee-Kanas/android_kernel_samsung_kanas