nilfs2: cleanup unused match_bool function
nilfs2: cleanup unused match_bool function

match_bool function is not used anymore.

Signed-off-by: Jiro SEKIBA <5bf4ce6b1d16b8e72b3c064fd853f5e60cd6303c@unicus.jp>
Signed-off-by: Ryusuke Konishi <f414f2bdd839fdc054376382fa67e9bc2fbf206f@lab.ntt.co.jp>

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