Remove remains of 'auto_generate_phrase_queries' (#35735)

This parameter in the `query_string` query was deprecated in 6.0 and ignored
since then. Its API methods and remaining uses can be removed in the upcoming
major version.

Relates to #35734

server/src/main/java/org/elasticsearch/index/query/QueryStringQueryBuilder.java

@@ -387,22 +387,6 @@ public class QueryStringQueryBuilder extends AbstractQueryBuilder<QueryStringQue
         return this;
     }
 
-    /**
-     * This setting is ignored
-     */
-    @Deprecated
-    public QueryStringQueryBuilder autoGeneratePhraseQueries(boolean autoGeneratePhraseQueries) {
-        return this;
-    }
-
-    /**
-     * This setting is ignored
-     */
-    @Deprecated
-    public boolean autoGeneratePhraseQueries() {
-        return false;
-    }
-
     /**
      * Protects against too-difficult regular expression queries.
      */

server/src/test/java/org/elasticsearch/index/query/QueryStringQueryBuilderTests.java

@@ -127,9 +127,6 @@ public class QueryStringQueryBuilderTests extends AbstractQueryTestCase<QueryStr
         if (randomBoolean()) {
             queryStringQueryBuilder.maxDeterminizedStates(randomIntBetween(1, 100));
         }
-        if (randomBoolean()) {
-            queryStringQueryBuilder.autoGeneratePhraseQueries(randomBoolean());
-        }
         if (randomBoolean()) {
             queryStringQueryBuilder.enablePositionIncrements(randomBoolean());
         }

server/src/test/java/org/elasticsearch/search/fetch/subphase/highlight/HighlighterSearchIT.java

@@ -19,6 +19,7 @@
 package org.elasticsearch.search.fetch.subphase.highlight;
 
 import com.carrotsearch.randomizedtesting.generators.RandomPicks;
+
 import org.apache.lucene.analysis.Analyzer;
 import org.apache.lucene.analysis.MockAnalyzer;
 import org.apache.lucene.analysis.MockTokenizer;
@@ -2589,22 +2590,22 @@ public class HighlighterSearchIT extends ESIntegTestCase {
         // Query string with a single field
         phraseBoostTestCaseForClauses(highlighterType, 100f,
                 queryStringQuery("highlight words together").field("field1"),
-                queryStringQuery("\"highlight words together\"").field("field1").autoGeneratePhraseQueries(true));
+                queryStringQuery("\"highlight words together\"").field("field1"));
 
         // Query string with a single field without dismax
         phraseBoostTestCaseForClauses(highlighterType, 100f,
                 queryStringQuery("highlight words together").field("field1"),
-                queryStringQuery("\"highlight words together\"").field("field1").autoGeneratePhraseQueries(true));
+                queryStringQuery("\"highlight words together\"").field("field1"));
 
         // Query string with more than one field
         phraseBoostTestCaseForClauses(highlighterType, 100f,
                 queryStringQuery("highlight words together").field("field1").field("field2"),
-                queryStringQuery("\"highlight words together\"").field("field1").field("field2").autoGeneratePhraseQueries(true));
+                queryStringQuery("\"highlight words together\"").field("field1").field("field2"));
 
         // Query string boosting the field
         phraseBoostTestCaseForClauses(highlighterType, 1f,
                 queryStringQuery("highlight words together").field("field1"),
-                queryStringQuery("\"highlight words together\"").field("field1", 100).autoGeneratePhraseQueries(true));
+                queryStringQuery("\"highlight words together\"").field("field1", 100));
     }
 
     private <P extends AbstractQueryBuilder<P>> void

x-pack/plugin/sql/src/main/java/org/elasticsearch/xpack/sql/querydsl/query/QueryStringQuery.java

@@ -33,7 +33,6 @@ public class QueryStringQuery extends LeafQuery {
         appliers.put("analyzer", (qb, s) -> qb.analyzer(s));
         appliers.put("quote_analyzer", (qb, s) -> qb.quoteAnalyzer(s));
         appliers.put("allow_leading_wildcard", (qb, s) -> qb.allowLeadingWildcard(Booleans.parseBoolean(s)));
-        appliers.put("auto_generate_phrase_queries", (qb, s) -> qb.autoGeneratePhraseQueries(Booleans.parseBoolean(s)));
         appliers.put("max_determinized_states", (qb, s) -> qb.maxDeterminizedStates(Integer.valueOf(s)));
         appliers.put("lowercase_expanded_terms", (qb, s) -> {});
         appliers.put("enable_position_increments", (qb, s) -> qb.enablePositionIncrements(Booleans.parseBoolean(s)));