Point briantigerchow/pubsub GoDep'ed module to the gx'ed version

This removes briantigerchow/pubsub from Godeps and uses our
gx'ed version instead.

License: MIT
Signed-off-by: Hector Sanjuan <hector@protocol.ai>

notifications/notifications.go

@@ -4,10 +4,9 @@ import (
 	"context"
 	"sync"
 
-	blocks "gx/ipfs/Qmej7nf81hi2x2tvjRBF3mcp74sQyuDH4VMYDGd1YtXjb2/go-block-format"
-
-	pubsub "github.com/ipfs/go-ipfs/Godeps/_workspace/src/github.com/briantigerchow/pubsub"
 	cid "gx/ipfs/QmcZfnkapfECQGcLZaf9B79NRg7cRa9EnZh4LSbkCzwNvY/go-cid"
+	pubsub "gx/ipfs/QmdbxjQWogRCHRaxhhGnYdT1oQJzL9GdqSKzCdqWr85AP2/pubsub"
+	blocks "gx/ipfs/Qmej7nf81hi2x2tvjRBF3mcp74sQyuDH4VMYDGd1YtXjb2/go-block-format"
 )
 
 const bufferSize = 16