Remove dead code.

Project: http://git-wip-us.apache.org/repos/asf/logging-log4j2/repo
Commit: http://git-wip-us.apache.org/repos/asf/logging-log4j2/commit/a8d901d9
Tree: http://git-wip-us.apache.org/repos/asf/logging-log4j2/tree/a8d901d9
Diff: http://git-wip-us.apache.org/repos/asf/logging-log4j2/diff/a8d901d9

Branch: refs/heads/master
Commit: a8d901d91d149d6dce3e271196629b2358d3fc95
Parents: f54195e
Author: ggregory <[email protected]>
Authored: Sun Aug 9 17:34:55 2015 -0700
Committer: ggregory <[email protected]>
Committed: Sun Aug 9 17:34:55 2015 -0700

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 .../logging/log4j/core/appender/rewrite/MapRewritePolicy.java    | 4 ----
 1 file changed, 4 deletions(-)
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http://git-wip-us.apache.org/repos/asf/logging-log4j2/blob/a8d901d9/log4j-core/src/main/java/org/apache/logging/log4j/core/appender/rewrite/MapRewritePolicy.java
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diff --git 
a/log4j-core/src/main/java/org/apache/logging/log4j/core/appender/rewrite/MapRewritePolicy.java
 
b/log4j-core/src/main/java/org/apache/logging/log4j/core/appender/rewrite/MapRewritePolicy.java
index ca1f5df..7377b2c 100644
--- 
a/log4j-core/src/main/java/org/apache/logging/log4j/core/appender/rewrite/MapRewritePolicy.java
+++ 
b/log4j-core/src/main/java/org/apache/logging/log4j/core/appender/rewrite/MapRewritePolicy.java
@@ -129,10 +129,6 @@ public final class MapRewritePolicy implements 
RewritePolicy {
             op = Mode.Add;
         } else {
             op = Mode.valueOf(mode);
-            if (op == null) {
-                LOGGER.error("Undefined mode " + mode);
-                return null;
-            }
         }
         if (pairs == null || pairs.length == 0) {
             LOGGER.error("keys and values must be specified for the 
MapRewritePolicy");

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