[RocksJava] Java sample bugfix

One of the latest commits broke the sample code. This
resolves the introduced bug.

java/samples/src/main/java/RocksDBSample.java

@@ -57,7 +57,6 @@ public class RocksDBSample {
     assert(options.compressionType() == CompressionType.SNAPPY_COMPRESSION);
     assert(options.compactionStyle() == CompactionStyle.UNIVERSAL);
 
-    try {
     assert(options.memTableFactoryName().equals("SkipListFactory"));
     options.setMemTableConfig(
         new HashSkipListMemTableConfig()
@@ -86,9 +85,7 @@ public class RocksDBSample {
     options.setRateLimiterConfig(new GenericRateLimiterConfig(10000000,
         10000, 10));
     options.setRateLimiterConfig(new GenericRateLimiterConfig(10000000));
-    } catch (RocksDBException e) {
-      assert(false);
-    }
+
 
     Filter bloomFilter = new BloomFilter(10);
     BlockBasedTableConfig table_options = new BlockBasedTableConfig();