Remove unused import.

Author: garydgregory

src/main/java/org/apache/commons/csv/CSVParser.java

@@ -27,7 +27,6 @@
 import java.io.InputStreamReader;
 import java.io.Reader;
 import java.io.StringReader;
-import java.io.UnsupportedEncodingException;
 import java.net.URL;
 import java.nio.charset.Charset;
 import java.nio.file.Files;