Remove blank lines added to Spark core

core/src/main/scala/org/apache/spark/util/collection/BitSet.scala

@@ -33,7 +33,6 @@ class BitSet(numBits: Int) extends Serializable {
    */
   def capacity: Int = numWords * 64
 
-
   /**
    * Set all the bits up to a given index
    */
@@ -48,7 +47,6 @@ class BitSet(numBits: Int) extends Serializable {
     }
   }
 
-
   /**
    * Compute the bit-wise AND of the two sets returning the
    * result.
@@ -66,7 +64,6 @@ class BitSet(numBits: Int) extends Serializable {
     newBS
   }
 
-
   /**
    * Compute the bit-wise OR of the two sets returning the
    * result.
@@ -92,7 +89,6 @@ class BitSet(numBits: Int) extends Serializable {
     newBS
   }
 
-
   /**
    * Sets the bit at the specified index to true.
    * @param index the bit index
@@ -119,7 +115,6 @@ class BitSet(numBits: Int) extends Serializable {
     (words(index >> 6) & bitmask) != 0  // div by 64 and mask
   }
 
-
   /**
    * Get an iterator over the set bits.
    */
@@ -145,7 +140,6 @@ class BitSet(numBits: Int) extends Serializable {
     sum
   }
 
-
   /**
    * Returns the index of the first bit that is set to true that occurs on or after the
    * specified starting index. If no such bit exists then -1 is returned.
@@ -185,7 +179,6 @@ class BitSet(numBits: Int) extends Serializable {
     -1
   }
 
-
   /** Return the number of longs it would take to hold numBits. */
   private def bit2words(numBits: Int) = ((numBits - 1) >> 6) + 1
 }

core/src/main/scala/org/apache/spark/util/collection/OpenHashSet.scala

@@ -198,7 +198,6 @@ class OpenHashSet[@specialized(Long, Int) T: ClassTag](
     _data(pos)
   }
 
-
   /**
    * Return the next position with an element stored, starting from the given position inclusively.
    */