remove cruft

plugin/ipam/driver.go

@@ -12,10 +12,6 @@ import (
 	. "github.com/weaveworks/weave/common"
 )
 
-const (
-	WeaveContainer = "weave"
-)
-
 type ipam struct {
 	weave *api.Client
 }

plugin/net/driver.go

@@ -17,8 +17,7 @@ import (
 )
 
 const (
-	WeaveContainer = "weave"
-	WeaveBridge    = "weave"
+	WeaveBridge = "weave"
 )
 
 type driver struct {