Remove SYNC command (#2499)

Author: sazzad16

src/main/java/redis/clients/jedis/BinaryClient.java

@@ -1083,10 +1083,6 @@ public void strlen(final byte[] key) {
     sendCommand(STRLEN, key);
   }
 
-  public void sync() {
-    sendCommand(SYNC);
-  }
-
   public void lpushx(final byte[] key, final byte[]... string) {
     sendCommand(LPUSHX, joinParameters(key, string));
   }

src/main/java/redis/clients/jedis/BinaryJedis.java

@@ -3707,10 +3707,6 @@ public Long strlen(final byte[] key) {
     return client.getIntegerReply();
   }
 
-  public void sync() {
-    client.sync();
-  }
-
   @Override
   public Long lpushx(final byte[] key, final byte[]... string) {
     checkIsInMultiOrPipeline();

src/main/java/redis/clients/jedis/Protocol.java

@@ -257,7 +257,7 @@ public static enum Command implements ProtocolCommand {
     PUNSUBSCRIBE, PUBSUB, ZCOUNT, ZRANGEBYSCORE, ZREVRANGEBYSCORE, ZREMRANGEBYRANK,
     ZREMRANGEBYSCORE, ZUNION, ZUNIONSTORE, ZINTER, ZINTERSTORE, ZLEXCOUNT, ZRANGEBYLEX, ZREVRANGEBYLEX,
     ZREMRANGEBYLEX, SAVE, BGSAVE, BGREWRITEAOF, LASTSAVE, SHUTDOWN, INFO, MONITOR, SLAVEOF, CONFIG,
-    STRLEN, SYNC, LPUSHX, PERSIST, RPUSHX, ECHO, LINSERT, DEBUG, BRPOPLPUSH, SETBIT, GETBIT,
+    STRLEN, LPUSHX, PERSIST, RPUSHX, ECHO, LINSERT, DEBUG, BRPOPLPUSH, SETBIT, GETBIT,
     BITPOS, SETRANGE, GETRANGE, EVAL, EVALSHA, SCRIPT, SLOWLOG, OBJECT, BITCOUNT, BITOP, SENTINEL,
     DUMP, RESTORE, PEXPIRE, PEXPIREAT, PTTL, INCRBYFLOAT, PSETEX, CLIENT, TIME, MIGRATE,
     HINCRBYFLOAT, SCAN, HSCAN, SSCAN, ZSCAN, WAIT, CLUSTER, ASKING, PFADD, PFCOUNT, PFMERGE,

src/test/java/redis/clients/jedis/tests/commands/ControlCommandsTest.java

@@ -123,11 +123,6 @@ public void configSet() {
     jedis.configSet("maxmemory", memory);
   }
 
-  @Test
-  public void sync() {
-    jedis.sync();
-  }
-
   @Test
   public void debug() {
     jedis.set("foo", "bar");