Remove specialized annotation from VertexRDD and EdgeRDD

It makes no difference in benchmarks.

Author: ankurdave

graphx/src/main/scala/org/apache/spark/graphx/EdgeRDD.scala

@@ -34,7 +34,7 @@ import org.apache.spark.graphx.impl.EdgeRDDImpl
  * edge to provide the triplet view. Shipping of the vertex attributes is managed by
  * `impl.ReplicatedVertexView`.
  */
-abstract class EdgeRDD[@specialized ED, VD](
+abstract class EdgeRDD[ED, VD](
     @transient sc: SparkContext,
     @transient deps: Seq[Dependency[_]]) extends RDD[Edge[ED]](sc, deps) {
   /**

graphx/src/main/scala/org/apache/spark/graphx/VertexRDD.scala

@@ -56,7 +56,7 @@ import org.apache.spark.graphx.impl.VertexRDDFunctions._
  *
  * @tparam VD the vertex attribute associated with each vertex in the set.
  */
-abstract class VertexRDD[@specialized VD](
+abstract class VertexRDD[VD](
     @transient sc: SparkContext,
     @transient deps: Seq[Dependency[_]]) extends RDD[(VertexId, VD)](sc, deps) {
 

graphx/src/main/scala/org/apache/spark/graphx/impl/EdgeRDDImpl.scala

@@ -25,7 +25,7 @@ import org.apache.spark.storage.StorageLevel
 
 import org.apache.spark.graphx._
 
-class EdgeRDDImpl[@specialized ED: ClassTag, VD: ClassTag] private[graphx] (
+class EdgeRDDImpl[ED: ClassTag, VD: ClassTag] private[graphx] (
     override val partitionsRDD: RDD[(PartitionID, EdgePartition[ED, VD])],
     val targetStorageLevel: StorageLevel = StorageLevel.MEMORY_ONLY)
   extends EdgeRDD[ED, VD](partitionsRDD.context, List(new OneToOneDependency(partitionsRDD))) {

graphx/src/main/scala/org/apache/spark/graphx/impl/VertexRDDImpl.scala

@@ -28,7 +28,7 @@ import org.apache.spark.graphx._
 import org.apache.spark.graphx.impl.RoutingTableMessageRDDFunctions._
 import org.apache.spark.graphx.impl.VertexRDDFunctions._
 
-class VertexRDDImpl[@specialized VD] private[graphx] (
+class VertexRDDImpl[VD] private[graphx] (
     val partitionsRDD: RDD[ShippableVertexPartition[VD]],
     val targetStorageLevel: StorageLevel = StorageLevel.MEMORY_ONLY)
   (implicit override protected val vdTag: ClassTag[VD])