Update CSVParser.parse(File, Charset, CSVFormat) from IO to NIO.

Author: garydgregory

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

@@ -21,7 +21,6 @@
 
 import java.io.Closeable;
 import java.io.File;
-import java.io.FileInputStream;
 import java.io.IOException;
 import java.io.InputStream;
 import java.io.InputStreamReader;