Remove Datastore from the ServiceBuilderTest as this class is deprecated:

Author: Hectorhammett

Core/tests/Unit/ServiceBuilderTest.php

@@ -20,7 +20,6 @@
 use Google\Cloud\Core\ServiceBuilder;
 use Google\Cloud\Core\Testing\CheckForClassTrait;
 use Google\Cloud\Core\Testing\GrpcTestTrait;
-use Google\Cloud\Datastore\DatastoreClient;
 use Google\Cloud\Firestore\FirestoreClient;
 use Google\Cloud\Language\LanguageClient;
 use Google\Cloud\Logging\LoggingClient;
@@ -147,10 +146,7 @@ public function serviceProvider()
             [
                 'bigQuery',
                 BigQueryClient::class
-            ], [
-                'datastore',
-                DatastoreClient::class
-            ], [
+            ],[
                 'firestore',
                 FirestoreClient::class,
                 [],