Simplify Pinner interface by folding ManualPinner into Pinner

Pinner had method GetManual that returned a ManualPinner, so every
Pinner had to implement ManualPinner anyway.

License: MIT
Signed-off-by: Jeromy <jeromyj@gmail.com>

merkledag_test.go

@@ -28,7 +28,7 @@ import (
 
 type dagservAndPinner struct {
 	ds DAGService
-	mp pin.ManualPinner
+	mp pin.Pinner
 }
 
 func getDagservAndPinner(t *testing.T) dagservAndPinner {
@@ -36,7 +36,7 @@ func getDagservAndPinner(t *testing.T) dagservAndPinner {
 	bs := bstore.NewBlockstore(db)
 	blockserv := bserv.New(bs, offline.Exchange(bs))
 	dserv := NewDAGService(blockserv)
-	mpin := pin.NewPinner(db, dserv).GetManual()
+	mpin := pin.NewPinner(db, dserv)
 	return dagservAndPinner{
 		ds: dserv,
 		mp: mpin,