remove no use import

Author: todd5167

core/src/main/java/com/dtstack/flink/sql/option/OptionParser.java

@@ -32,7 +32,6 @@
 import java.io.File;
 import java.net.URLEncoder;
 
-import org.apache.commons.codec.Charsets;
 import org.apache.flink.util.FileUtils;