Fix deletion of unprotected branches (#2630)

* fix deletion of unprotected branches

* fmt fix

* changed internal protected branch api

* fix lint error

Signed-off-by: David Schneiderbauer <dschneiderbauer@gmail.com>

routers/private/branch.go

@@ -20,11 +20,6 @@ func GetProtectedBranchBy(ctx *macaron.Context) {
 			"err": err.Error(),
 		})
 		return
-	} else if protectBranch != nil {
-		ctx.JSON(200, protectBranch)
-	} else {
-		ctx.JSON(200, &models.ProtectedBranch{
-			CanPush: true,
-		})
 	}
+	ctx.JSON(200, protectBranch)
 }