Remove an unused method

src/com/amazon/ion/impl/bin/WriteBuffer.java

@@ -157,27 +157,6 @@ private void writeBytesSlow(final byte[] bytes, int off, int len)
 
     }
 
-    /**
-     * Adds all-zero bytes. Useful for padding a FixedInt where the minimum needed to represent the value is
-     * less than the required number of bytes in the spec.
-     */
-    private void writeZeroBytes(int len) {
-        if (len < remaining()) {
-            current.limit += len;
-        } else do {
-            final int amount = Math.min(len, current.remaining());
-            current.limit += amount;
-            len -= amount;
-            if (current.remaining() == 0) {
-                if (index == blocks.size() - 1) {
-                    allocateNewBlock();
-                }
-                index++;
-                current = blocks.get(index);
-            }
-        } while (len > 0);
-    }
-
     /** Writes an array of bytes to the buffer expanding if necessary. */
     public void writeBytes(final byte[] bytes, final int off, final int len)
     {