move method only used in tests to the tests

block-storage/src/main/java/org/lucares/pdb/diskstorage/DiskStorage.java

@@ -54,18 +54,6 @@ public class DiskStorage implements AutoCloseable {
 		fileChannel.close();
 	}
 
-	public long[] allocateBlocks(final int numNewBlocks, final int blockSize) throws IOException {
-
-		final long[] result = new long[numNewBlocks];
-		synchronized (fileChannel) {
-			for (int i = 0; i < numNewBlocks; i++) {
-				final long blockOffset = allocateBlock(blockSize);
-				result[i] = blockOffset;
-			}
-		}
-		return result;
-	}
-
 	public synchronized long allocateBlock(final int blockSize) throws IOException {
 
 		if (blockSize < FREE_LIST_NODE_SIZE) {