Reverting the taskqueue migration preview changes.

PiperOrigin-RevId: 965747426
Change-Id: Ifb987467ca810ef544076094ccdb9e1dce1ab5b7

Author: gae-java-bot

api/pom.xml

@@ -122,10 +122,6 @@
       <groupId>javax.servlet</groupId>
       <artifactId>javax.servlet-api</artifactId>
     </dependency>
-    <dependency>
-      <groupId>com.google.cloud</groupId>
-      <artifactId>google-cloud-tasks</artifactId>
-    </dependency>
     <dependency>
       <groupId>org.antlr</groupId>
       <artifactId>antlr-runtime</artifactId>

api/src/main/java/com/google/appengine/api/datastore/DatastoreApiHelper.java

@@ -56,16 +56,6 @@ public final class DatastoreApiHelper {
 
   private DatastoreApiHelper() {}
 
-  /**
-   * Registers a callback to be executed immediately after the specified transaction commits.
-   * If the transaction is rolled back or fails to commit, the callback will not be invoked.
-   */
-  public static void addPostCommitCallback(Transaction txn, Runnable callback) {
-    if (txn instanceof TransactionImpl txnImpl && callback != null) {
-      txnImpl.addPostCommitCallback(callback);
-    }
-  }
-
   // Corresponds to _ToDatastoreError in datastore.py.
   // Keep in sync!
   public static RuntimeException translateError(ApiProxy.ApplicationException exception) {

api/src/main/java/com/google/appengine/api/datastore/TransactionImpl.java

@@ -81,14 +81,6 @@ enum TransactionState {
 
   TransactionState state = TransactionState.BEGUN;
 
-  private final List<Runnable> postCommitCallbacks = new java.util.concurrent.CopyOnWriteArrayList<>();
-
-  void addPostCommitCallback(Runnable callback) {
-    if (callback != null) {
-      postCommitCallbacks.add(callback);
-    }
-  }
-
   /** A {@link PostOpFuture} implementation that runs both post put and post delete callbacks. */
   private class PostCommitFuture extends PostOpFuture<Void> {
     private final List<Entity> putEntities;
@@ -108,13 +100,6 @@ void executeCallbacks(Void ignoreMe) {
       DeleteContext deleteContext =
           new DeleteContext(TransactionImpl.this, TransactionImpl.this, deletedKeys);
       callbacks.executePostDeleteCallbacks(deleteContext);
-      for (Runnable callback : postCommitCallbacks) {
-        try {
-          callback.run();
-        } catch (Throwable t) {
-          logger.log(Level.SEVERE, "Exception in post-commit callback: " + t.getMessage(), t);
-        }
-      }
     }
   }