No need to declare private method final

git-svn-id: https://svn.apache.org/repos/asf/commons/proper/csv/trunk@1512398 13f79535-47bb-0310-9956-ffa450edef68

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

@@ -287,7 +287,7 @@ final class Lexer {
         }
     }
 
-    private final char mapNullToDisabled(final Character c) {
+    private char mapNullToDisabled(final Character c) {
         return c == null ? DISABLED : c.charValue();
     }