Revert "[Kernel] [CC Refactor #2] Add TableDescriptor and CommitCoordinatorClient API" (delta-io#3917)

This reverts commit 6ae4b62

We seem to be rethinking our Coordinated Commits CUJ / APIs, and we
don't want these APIs leaked in Delta 3.3.

Author: scottsand-db

kernel/kernel-api/src/main/java/io/delta/kernel/TableIdentifier.java

@@ -61,7 +61,7 @@ public boolean equals(Object o) {
     if (o == null || getClass() != o.getClass()) {
       return false;
     }
-    final TableIdentifier that = (TableIdentifier) o;
+    TableIdentifier that = (TableIdentifier) o;
     return Arrays.equals(getNamespace(), that.getNamespace()) && getName().equals(that.getName());
   }
 

kernel/kernel-api/src/main/java/io/delta/kernel/coordinatedcommits/CommitCoordinatorClient.java

@@ -17,7 +17,6 @@
 package io.delta.kernel.engine;
 
 import io.delta.kernel.annotation.Evolving;
-import io.delta.kernel.coordinatedcommits.CommitCoordinatorClient;
 import java.util.Map;
 
 /**
@@ -57,23 +56,6 @@ public interface Engine {
    */
   ParquetHandler getParquetHandler();
 
-  /**
-   * Retrieves a {@link CommitCoordinatorClient} for the specified commit coordinator name.
-   *
-   * @param commitCoordinatorName The name (identifier) of the underlying commit coordinator client
-   *     to instantiate
-   * @param commitCoordinatorConf The configuration settings for the underlying commit coordinator
-   *     client, taken directly from the Delta table property {@link
-   *     io.delta.kernel.internal.TableConfig#COORDINATED_COMMITS_TABLE_CONF}
-   * @return A {@link CommitCoordinatorClient} implementation corresponding to the specified commit
-   *     coordinator name
-   * @since 3.3.0
-   */
-  default CommitCoordinatorClient getCommitCoordinatorClient(
-      String commitCoordinatorName, Map<String, String> commitCoordinatorConf) {
-    throw new UnsupportedOperationException("Not implemented");
-  }
-
   /**
    * Retrieves a {@link CommitCoordinatorClientHandler} for the specified commit coordinator client.
    *