Add print statement to default remove routine

core/src/main/scala/org/apache/spark/storage/memory/MemoryStore.scala

@@ -386,6 +386,7 @@ private[spark] class MemoryStore(
 
   def remove(blockId: BlockId): Boolean = memoryManager.synchronized {
     val entry = entries.synchronized {
+      println(s"Hello, world!")
       entries.remove(blockId)
     }
     if (entry != null) {