remove 1.6
remove 1.6

mattn/go-sqlite3,danderson/go-sqlite3,helight/helight_code,accense/go-sqlite3,accense/go-sqlite3,accense/go-sqlite3,helight/helight_code,xeodou/go-sqlcipher,mattn/go-sqlite3,xeodou/go-sqlcipher,helight/helight_code,helight/helight_code,helight/helight_code,helight/helight_code,danderson/go-sqlite3,helight/helight_code,lyonel/go-sqlite3,danderson/go-sqlite3,helight/helight_code,mattn/go-sqlite3,helight/helight_code,lyonel/go-sqlite3,lyonel/go-sqlite3,xeodou/go-sqlcipher