[hotfix] Fix SimpleStringSchema serialization issue

flink-streaming-java/src/main/java/org/apache/flink/streaming/util/serialization/SimpleStringSchema.java

@@ -20,8 +20,6 @@ package org.apache.flink.streaming.util.serialization;
 import org.apache.flink.api.common.typeinfo.BasicTypeInfo;
 import org.apache.flink.api.common.typeinfo.TypeInformation;
 
-import java.nio.charset.Charset;
-
 /**
  * Very simple serialization schema for strings.
  */
@@ -30,19 +28,9 @@ public class SimpleStringSchema implements DeserializationSchema<String>,
 
 	private static final long serialVersionUID = 1L;
 
-	private Charset charset = Charset.defaultCharset();
-
-	public SimpleStringSchema() {
-
-	}
-
-	public SimpleStringSchema(Charset charset) {
-		this.charset = charset;
-	}
-
 	@Override
 	public String deserialize(byte[] message) {
-		return new String(message, charset);
+		return new String(message);
 	}
 
 	@Override
@@ -52,7 +40,7 @@ public class SimpleStringSchema implements DeserializationSchema<String>,
 
 	@Override
 	public byte[] serialize(String element) {
-		return element.getBytes(charset);
+		return element.getBytes();
 	}
 
 	@Override