remove go files

Dockerfile

Gopkg.lock

Gopkg.toml

LICENSE

README.md

command-handler.go

commands.go

config.go

example-config.json

gitlab-auth.go

gitlab-webhook.go

matrix.go

maulabbot.go

vendor/github.com/golang/protobuf/AUTHORS

vendor/github.com/golang/protobuf/CONTRIBUTORS

vendor/github.com/golang/protobuf/LICENSE

vendor/github.com/golang/protobuf/proto/clone.go

vendor/github.com/golang/protobuf/proto/decode.go

vendor/github.com/golang/protobuf/proto/discard.go

vendor/github.com/golang/protobuf/proto/encode.go