impl(bigtable): remove metadata policy (#15874)

Author: mpeddada1

ci/abi-dumps/google_cloud_cpp_bigtable.expected.abi.dump.gz

@@ -282,6 +282,14 @@ guide:
 
 </details>
 
+<details>
+<summary>Removed <code>bigtable::MetadataUpdatePolicy</code></summary>
+
+The `bigtable::MetadataUpdatePolicy` class has been removed. It was only used in
+internal legacy files.
+
+</details>
+
 ### Pubsub
 
 ### Spanner

doc/v3-migration-guide.md

@@ -223,8 +223,6 @@ add_library(
     internal/traced_row_reader.h
     internal/tuple_utils.h
     internal/unary_client_utils.h
-    metadata_update_policy.cc
-    metadata_update_policy.h
     mutation_batcher.cc
     mutation_batcher.h
     mutation_branch.h
@@ -477,7 +475,6 @@ if (BUILD_TESTING)
         internal/retry_traits_test.cc
         internal/traced_row_reader_test.cc
         internal/tuple_utils_test.cc
-        metadata_update_policy_test.cc
         mocks/mock_row_reader_test.cc
         mutation_batcher_test.cc
         mutations_test.cc

google/cloud/bigtable/CMakeLists.txt

@@ -68,7 +68,6 @@ bigtable_client_unit_tests = [
     "internal/retry_traits_test.cc",
     "internal/traced_row_reader_test.cc",
     "internal/tuple_utils_test.cc",
-    "metadata_update_policy_test.cc",
     "mocks/mock_row_reader_test.cc",
     "mutation_batcher_test.cc",
     "mutations_test.cc",

google/cloud/bigtable/bigtable_client_unit_tests.bzl

@@ -113,7 +113,6 @@ google_cloud_cpp_bigtable_hdrs = [
     "internal/traced_row_reader.h",
     "internal/tuple_utils.h",
     "internal/unary_client_utils.h",
-    "metadata_update_policy.h",
     "mutation_batcher.h",
     "mutation_branch.h",
     "mutations.h",
@@ -222,7 +221,6 @@ google_cloud_cpp_bigtable_srcs = [
     "internal/readrowsparser.cc",
     "internal/retry_traits.cc",
     "internal/traced_row_reader.cc",
-    "metadata_update_policy.cc",
     "mutation_batcher.cc",
     "mutations.cc",
     "polling_policy.cc",

google/cloud/bigtable/google_cloud_cpp_bigtable.bzl

@@ -20,7 +20,6 @@
 #include "google/cloud/bigtable/internal/operation_context.h"
 #include "google/cloud/bigtable/internal/readrowsparser.h"
 #include "google/cloud/bigtable/internal/row_reader_impl.h"
-#include "google/cloud/bigtable/metadata_update_policy.h"
 #include "google/cloud/bigtable/options.h"
 #include "google/cloud/bigtable/row.h"
 #include "google/cloud/bigtable/row_set.h"

google/cloud/bigtable/internal/default_row_reader.h

@@ -18,7 +18,6 @@
 #include "google/cloud/bigtable/filters.h"
 #include "google/cloud/bigtable/internal/readrowsparser.h"
 #include "google/cloud/bigtable/internal/row_reader_impl.h"
-#include "google/cloud/bigtable/metadata_update_policy.h"
 #include "google/cloud/bigtable/row_set.h"
 #include "google/cloud/bigtable/rpc_backoff_policy.h"
 #include "google/cloud/bigtable/rpc_retry_policy.h"