Remove all code references to Badger

go.mod

@@ -7,7 +7,6 @@ require (
 	github.com/BurntSushi/toml v0.3.1 // indirect
 	github.com/cespare/xxhash v1.1.0 // indirect
 	github.com/coocood/freecache v1.1.0
-	github.com/dgraph-io/badger v1.5.4
 	github.com/dgryski/go-farm v0.0.0-20180109070241-2de33835d102 // indirect
 	github.com/golang/protobuf v1.2.0
 	github.com/google/btree v0.0.0-20180813153112-4030bb1f1f0c

go.sum

@@ -20,8 +20,6 @@ github.com/coreos/go-semver v0.2.0 h1:3Jm3tLmsgAYcjC+4Up7hJrFBPr+n7rAqYeSw/SZazu
 github.com/coreos/go-semver v0.2.0/go.mod h1:nnelYz7RCh+5ahJtPPxZlU+153eP4D4r3EedlOD2RNk=
 github.com/davecgh/go-spew v1.1.1 h1:vj9j/u1bqnvCEfJOwUhtlOARqs3+rkHYY13jYWTU97c=
 github.com/davecgh/go-spew v1.1.1/go.mod h1:J7Y8YcW2NihsgmVo/mv3lAwl/skON4iLHjSsI+c5H38=
-github.com/dgraph-io/badger v1.5.4 h1:gVTrpUTbbr/T24uvoCaqY2KSHfNLVGm0w+hbee2HMeg=
-github.com/dgraph-io/badger v1.5.4/go.mod h1:VZxzAIRPHRVNRKRo6AXrX9BJegn6il06VMTZVJYCIjQ=
 github.com/dgryski/go-farm v0.0.0-20180109070241-2de33835d102 h1:afESQBXJEnj3fu+34X//E8Wg3nEbMJxJkwSc0tPePK0=
 github.com/dgryski/go-farm v0.0.0-20180109070241-2de33835d102/go.mod h1:SqUrOPUnsFjfmXRMNPybcSiG0BgUW2AuFH8PAnS2iTw=
 github.com/fsnotify/fsnotify v1.4.7 h1:IXs+QLmnXW2CcXuY+8Mzv/fWEsPGWxqefPtCP5CnV9I=