fix(deps): mod tidy

Author: hannahhoward

go.mod

@@ -28,7 +28,6 @@ require (
 	github.com/jbenet/go-random v0.0.0-20190219211222-123a90aedc0c
 	github.com/libp2p/go-libp2p v0.6.0
 	github.com/libp2p/go-libp2p-core v0.5.0
-	github.com/libp2p/go-libp2p-peer v0.2.0
 	github.com/libp2p/go-libp2p-record v0.1.1 // indirect
 	github.com/multiformats/go-multiaddr v0.2.1
 	github.com/multiformats/go-multihash v0.0.13