Update RewriteExtension.java to drop magicalMetricsLogString

Author: timtebeek

plugin/src/main/java/org/openrewrite/gradle/RewriteExtension.java

@@ -29,7 +29,6 @@
 
 @SuppressWarnings("unused")
 public class RewriteExtension {
-    private static final String magicalMetricsLogString = "LOG";
 
     private final List<String> activeRecipes = new ArrayList<>();
     private final List<String> activeStyles = new ArrayList<>();