git: sys/vfs/hammer2: Remove unused hammer2_chain_frees sysctl

[Tomohiro Kusumi]

commit a8dc19912341f1e9ce9b3138e89a38e6f1a6affa
Author: Tomohiro Kusumi <tkusumi at netbsd.org>
Date:   Sat Sep 12 03:37:29 2020 +0900

    sys/vfs/hammer2: Remove unused hammer2_chain_frees sysctl
    
    Appeared in 7d565a4f16015b664e90560061ad7574c3e68737 in 2016,
    but never used.

Summary of changes:
 sys/vfs/hammer2/hammer2.h        | 1 -
 sys/vfs/hammer2/hammer2_vfsops.c | 3 ---
 2 files changed, 4 deletions(-)

http://gitweb.dragonflybsd.org/dragonfly.git/commitdiff/a8dc19912341f1e9ce9b3138e89a38e6f1a6affa


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