Remove unused branch and initialize workDirectory immediately

This closes #55
diff --git a/maven-release-manager/src/main/java/org/apache/maven/shared/release/phase/RunPerformGoalsPhase.java b/maven-release-manager/src/main/java/org/apache/maven/shared/release/phase/RunPerformGoalsPhase.java
index 0d7af65..7c63a5f 100644
--- a/maven-release-manager/src/main/java/org/apache/maven/shared/release/phase/RunPerformGoalsPhase.java
+++ b/maven-release-manager/src/main/java/org/apache/maven/shared/release/phase/RunPerformGoalsPhase.java
@@ -110,15 +110,7 @@
             foundPom = pomFinder.parsePom( pomFile );
         }
 
-        File workDirectory;
-        if ( simulate )
-        {
-            workDirectory = new File( releaseDescriptor.getWorkingDirectory() );
-        }
-        else
-        {
-            workDirectory = new File( releaseDescriptor.getCheckoutDirectory() );
-        }
+        File workDirectory = new File( releaseDescriptor.getCheckoutDirectory() );
 
         if ( foundPom )
         {