Remove deprecated exceptions (elastic#28059)

DeleteFailedEngineException and IndexFailedEngineException were
deprecated in 6.0. This commit removes them entirely in 7.0.

Author: DaveCTurner

core/src/main/java/org/elasticsearch/ElasticsearchException.java

@@ -769,8 +769,7 @@ private enum ElasticsearchExceptionHandle {
         // 26 was BatchOperationException
         SNAPSHOT_CREATION_EXCEPTION(org.elasticsearch.snapshots.SnapshotCreationException.class,
                 org.elasticsearch.snapshots.SnapshotCreationException::new, 27, UNKNOWN_VERSION_ADDED),
-        DELETE_FAILED_ENGINE_EXCEPTION(org.elasticsearch.index.engine.DeleteFailedEngineException.class, // deprecated in 6.0, remove in 7.0
-                org.elasticsearch.index.engine.DeleteFailedEngineException::new, 28, UNKNOWN_VERSION_ADDED),
+        // 28 was DeleteFailedEngineException, deprecated in 6.0, removed in 7.0
         DOCUMENT_MISSING_EXCEPTION(org.elasticsearch.index.engine.DocumentMissingException.class,
                 org.elasticsearch.index.engine.DocumentMissingException::new, 29, UNKNOWN_VERSION_ADDED),
         SNAPSHOT_EXCEPTION(org.elasticsearch.snapshots.SnapshotException.class,
@@ -866,8 +865,7 @@ private enum ElasticsearchExceptionHandle {
                 org.elasticsearch.action.TimestampParsingException::new, 78, UNKNOWN_VERSION_ADDED),
         ROUTING_MISSING_EXCEPTION(org.elasticsearch.action.RoutingMissingException.class,
                 org.elasticsearch.action.RoutingMissingException::new, 79, UNKNOWN_VERSION_ADDED),
-        INDEX_FAILED_ENGINE_EXCEPTION(org.elasticsearch.index.engine.IndexFailedEngineException.class, // deprecated in 6.0, remove in 7.0
-                org.elasticsearch.index.engine.IndexFailedEngineException::new, 80, UNKNOWN_VERSION_ADDED),
+        // 80 was IndexFailedEngineException, deprecated in 6.0, removed in 7.0
         INDEX_SHARD_RESTORE_FAILED_EXCEPTION(org.elasticsearch.index.snapshots.IndexShardRestoreFailedException.class,
                 org.elasticsearch.index.snapshots.IndexShardRestoreFailedException::new, 81, UNKNOWN_VERSION_ADDED),
         REPOSITORY_EXCEPTION(org.elasticsearch.repositories.RepositoryException.class,

core/src/main/java/org/elasticsearch/index/engine/DeleteFailedEngineException.java

@@ -696,7 +696,7 @@ public void testIds() {
         ids.put(25, org.elasticsearch.script.GeneralScriptException.class);
         ids.put(26, null);
         ids.put(27, org.elasticsearch.snapshots.SnapshotCreationException.class);
-        ids.put(28, org.elasticsearch.index.engine.DeleteFailedEngineException.class); //deprecated in 6.0
+        ids.put(28, null); // was DeleteFailedEngineException, deprecated in 6.0 and removed in 7.0
         ids.put(29, org.elasticsearch.index.engine.DocumentMissingException.class);
         ids.put(30, org.elasticsearch.snapshots.SnapshotException.class);
         ids.put(31, org.elasticsearch.indices.InvalidAliasNameException.class);
@@ -748,7 +748,7 @@ public void testIds() {
         ids.put(77, org.elasticsearch.common.util.concurrent.UncategorizedExecutionException.class);
         ids.put(78, org.elasticsearch.action.TimestampParsingException.class);
         ids.put(79, org.elasticsearch.action.RoutingMissingException.class);
-        ids.put(80, org.elasticsearch.index.engine.IndexFailedEngineException.class); //deprecated in 6.0
+        ids.put(80, null); // was IndexFailedEngineException, deprecated in 6.0 and removed in 7.0
         ids.put(81, org.elasticsearch.index.snapshots.IndexShardRestoreFailedException.class);
         ids.put(82, org.elasticsearch.repositories.RepositoryException.class);
         ids.put(83, org.elasticsearch.transport.ReceiveTimeoutTransportException.class);