firestore: deprecate v1beta1 client

Change-Id: Idd0dada30dd5ed85da1462fa97fc639ac08d101b
Reviewed-on: https://code-review.googlesource.com/c/gocloud/+/53830
Reviewed-by: kokoro <noreply+kokoro@google.com>
Reviewed-by: Tyler Bui-Palsulich <tbp@google.com>
diff --git a/firestore/apiv1beta1/doc.go b/firestore/apiv1beta1/doc.go
index 15629db..0228898 100644
--- a/firestore/apiv1beta1/doc.go
+++ b/firestore/apiv1beta1/doc.go
@@ -32,6 +32,9 @@
 //
 // For information about setting deadlines, reusing contexts, and more
 // please visit godoc.org/cloud.google.com/go.
+//
+// Deprecated: Please use "cloud.google.com/go/firestore/apiv1". This beta
+// client will be removed in a future release.
 package firestore // import "cloud.google.com/go/firestore/apiv1beta1"
 
 import (
diff --git a/internal/gapicgen/generator/config.go b/internal/gapicgen/generator/config.go
index 665e214..edcca8a 100644
--- a/internal/gapicgen/generator/config.go
+++ b/internal/gapicgen/generator/config.go
@@ -481,14 +481,6 @@
 		releaseLevel:          "ga",
 	},
 	{
-		inputDirectoryPath:    "google/firestore/v1beta1",
-		pkg:                   "firestore",
-		importPath:            "cloud.google.com/go/firestore/apiv1beta1",
-		gRPCServiceConfigPath: "google/firestore/v1beta1/firestore_grpc_service_config.json",
-		apiServiceConfigPath:  "google/firestore/v1beta1/firestore_v1beta1.yaml",
-		releaseLevel:          "beta",
-	},
-	{
 		inputDirectoryPath:    "google/devtools/cloudbuild/v1",
 		pkg:                   "cloudbuild",
 		importPath:            "cloud.google.com/go/cloudbuild/apiv1/v2",