Revert "Add getCodec method to StatefulConnection (#3444)"

This reverts commit bcabe0f.

Author: a-TODO-rov

src/main/java/io/lettuce/core/StatefulRedisConnectionImpl.java

@@ -109,7 +109,6 @@ public StatefulRedisConnectionImpl(RedisChannelWriter writer, PushHandler pushHa
         this.reactive = newRedisReactiveCommandsImpl();
     }
 
-    @Override
     public RedisCodec<K, V> getCodec() {
         return codec;
     }

src/main/java/io/lettuce/core/api/StatefulConnection.java

@@ -6,7 +6,6 @@
 
 import io.lettuce.core.ClientOptions;
 import io.lettuce.core.RedisConnectionStateListener;
-import io.lettuce.core.codec.RedisCodec;
 import io.lettuce.core.protocol.RedisCommand;
 import io.lettuce.core.resource.ClientResources;
 
@@ -118,9 +117,4 @@ public interface StatefulConnection<K, V> extends AutoCloseable, AsyncCloseable
      */
     void flushCommands();
 
-    /**
-     * @return the {@link RedisCodec} used by this connection.
-     */
-    RedisCodec<K, V> getCodec();
-
 }

src/main/java/io/lettuce/core/cluster/StatefulRedisClusterConnectionImpl.java

@@ -126,11 +126,6 @@ public StatefulRedisClusterConnectionImpl(RedisChannelWriter writer, ClusterPush
         this.reactive = newRedisAdvancedClusterReactiveCommandsImpl();
     }
 
-    @Override
-    public RedisCodec<K, V> getCodec() {
-        return codec;
-    }
-
     protected RedisAdvancedClusterReactiveCommandsImpl<K, V> newRedisAdvancedClusterReactiveCommandsImpl() {
         return new RedisAdvancedClusterReactiveCommandsImpl<>((StatefulRedisClusterConnection<K, V>) this, codec, parser);
     }

src/main/java/io/lettuce/core/masterslave/MasterSlaveConnectionWrapper.java

@@ -11,7 +11,6 @@
 import io.lettuce.core.api.push.PushListener;
 import io.lettuce.core.api.reactive.RedisReactiveCommands;
 import io.lettuce.core.api.sync.RedisCommands;
-import io.lettuce.core.codec.RedisCodec;
 import io.lettuce.core.masterreplica.StatefulRedisMasterReplicaConnection;
 import io.lettuce.core.protocol.RedisCommand;
 import io.lettuce.core.resource.ClientResources;
@@ -135,9 +134,4 @@ public void flushCommands() {
         delegate.flushCommands();
     }
 
-    @Override
-    public RedisCodec<K, V> getCodec() {
-        return delegate.getCodec();
-    }
-
 }

src/main/java/io/lettuce/core/sentinel/StatefulRedisSentinelConnectionImpl.java

@@ -128,11 +128,6 @@ public ConnectionState getConnectionState() {
         return connectionState;
     }
 
-    @Override
-    public RedisCodec<K, V> getCodec() {
-        return codec;
-    }
-
     static class SentinelConnectionState extends ConnectionState {
 
         @Override