Remove unnecessary ClassTag for VD parameters

Author: ankurdave

graphx/src/main/scala/org/apache/spark/graphx/lib/LabelPropagation.scala

@@ -41,7 +41,7 @@ object LabelPropagation {
    *
    * @return a graph with vertex attributes containing the label of community affiliation
    */
-  def run[VD: ClassTag, ED: ClassTag](graph: Graph[VD, ED], maxSteps: Int): Graph[VertexId, ED] = {
+  def run[VD, ED: ClassTag](graph: Graph[VD, ED], maxSteps: Int): Graph[VertexId, ED] = {
     val lpaGraph = graph.mapVertices { case (vid, _) => vid }
     def sendMessage(e: EdgeTriplet[VertexId, ED]) = {
       Iterator((e.srcId, Map(e.dstAttr -> 1L)), (e.dstId, Map(e.srcAttr -> 1L)))

graphx/src/main/scala/org/apache/spark/graphx/lib/ShortestPaths.scala

@@ -49,7 +49,7 @@ object ShortestPaths {
    * @return a graph where each vertex attribute is a map containing the shortest-path distance to
    * each reachable landmark vertex.
    */
-  def run[VD: ClassTag, ED: ClassTag](graph: Graph[VD, ED], landmarks: Seq[VertexId]): Graph[SPMap, ED] = {
+  def run[VD, ED: ClassTag](graph: Graph[VD, ED], landmarks: Seq[VertexId]): Graph[SPMap, ED] = {
     val spGraph = graph.mapVertices { (vid, attr) =>
       if (landmarks.contains(vid)) makeMap(vid -> 0) else makeMap()
     }