Simplify boolean expression: emptyHeader will always be true when reached.

git-svn-id: https://svn.apache.org/repos/asf/commons/proper/csv/trunk@1742466 13f79535-47bb-0310-9956-ffa450edef68

Author: britter

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

@@ -403,8 +403,7 @@ private Map<String, Integer> initializeHeader() throws IOException {
                     final String header = headerRecord[i];
                     final boolean containsHeader = hdrMap.containsKey(header);
                     final boolean emptyHeader = header == null || header.trim().isEmpty();
-                    if (containsHeader &&
-                            (!emptyHeader || (emptyHeader && !this.format.getAllowMissingColumnNames()))) {
+                    if (containsHeader && (!emptyHeader || !this.format.getAllowMissingColumnNames())) {
                         throw new IllegalArgumentException("The header contains a duplicate name: \"" + header +
                                 "\" in " + Arrays.toString(headerRecord));
                     }