Revert "LUCENE-9021 QueryParser: re-use the LookaheadSuccess exception (apache#962)"

This reverts commit ccf3e60.

Author: mkhludnev

gradle/generation/javacc.gradle

@@ -120,9 +120,6 @@ configure(project(":lucene:queryparser")) {
           text = text.replace(
               "new java.util.ArrayList<int[]>",
               "new java.util.ArrayList<>")
-          text = text.replace(
-              "final private LookaheadSuccess jj_ls =",
-              "static final private LookaheadSuccess jj_ls =")
           return text
         })
       }

lucene/CHANGES.txt

@@ -253,8 +253,6 @@ Optimizations
 
 * LUCENE-9536: Reduced memory usage for OrdinalMap when a segment has all
   values. (Julie Tibshirani via Adrien Grand)
-  
-* LUCENE-9021: QueryParser: re-use the LookaheadSuccess exception. (Przemek Bruski via Mikhail Khludnev)
 
 Bug Fixes
 ---------------------

lucene/queryparser/src/java/org/apache/lucene/queryparser/classic/QueryParser.java

@@ -869,7 +869,7 @@ private Token jj_consume_token(int kind) throws ParseException {
 
   @SuppressWarnings("serial")
   static private final class LookaheadSuccess extends java.lang.Error { }
-  static final private LookaheadSuccess jj_ls = new LookaheadSuccess();
+  final private LookaheadSuccess jj_ls = new LookaheadSuccess();
   private boolean jj_scan_token(int kind) {
      if (jj_scanpos == jj_lastpos) {
        jj_la--;