diff --git a/tool/src/org/antlr/v4/tool/ErrorManager.java b/tool/src/org/antlr/v4/tool/ErrorManager.java
index 34f0d504d..2ed218bd1 100644
--- a/tool/src/org/antlr/v4/tool/ErrorManager.java
+++ b/tool/src/org/antlr/v4/tool/ErrorManager.java
@@ -16,7 +16,6 @@ import java.io.File;
 import java.net.URL;
 import java.util.Collection;
 import java.util.EnumSet;
-import java.util.Locale;
 import java.util.Set;
 
 public class ErrorManager {
@@ -32,8 +31,6 @@ public class ErrorManager {
     /** The group of templates that represent the current message format. */
     STGroup format;
 
-    /** Messages should be sensitive to the locale. */
-    Locale locale;
     String formatName;
 
     ErrorBuffer initSTListener = new ErrorBuffer();