Remove unused debugging functions from block cache module.
Remove unused debugging functions from block cache module.

Change-Id: I274f526fa8c38bbe0743f9d8dd166644fe7e014f

couchbase/forestdb,hisundar/forestdb,seem-sky/forestdb,yyangpan/forestdb,wurikiji/forestdb,jinxuan/forestdb,couchbase/forestdb,nvoron23/forestdb,seem-sky/forestdb,zhaog/forestdb,jinxuan/forestdb,yyangpan/forestdb,wurikiji/forestdb,sushmaad/forestdb,nvoron23/forestdb,zhaog/forestdb,sushmaad/forestdb,joliss/forestdb,joliss/forestdb,hisundar/forestdb