Remove obsolete nanopb::Tag

Author: rsgowman

Firestore/core/src/firebase/firestore/local/local_serializer.cc

@@ -27,7 +27,6 @@
 #include "Firestore/core/src/firebase/firestore/model/field_value.h"
 #include "Firestore/core/src/firebase/firestore/model/no_document.h"
 #include "Firestore/core/src/firebase/firestore/model/snapshot_version.h"
-#include "Firestore/core/src/firebase/firestore/nanopb/tag.h"
 #include "Firestore/core/src/firebase/firestore/util/hard_assert.h"
 #include "Firestore/core/src/firebase/firestore/util/string_format.h"
 
@@ -42,7 +41,6 @@ using model::NoDocument;
 using model::ObjectValue;
 using model::SnapshotVersion;
 using nanopb::Reader;
-using nanopb::Tag;
 using nanopb::Writer;
 using util::Status;
 using util::StringFormat;

Firestore/core/src/firebase/firestore/nanopb/CMakeLists.txt

@@ -15,7 +15,6 @@
 cc_library(
   firebase_firestore_nanopb
   SOURCES
-    tag.h
     reader.h
     reader.cc
     writer.h

Firestore/core/src/firebase/firestore/nanopb/tag.h

@@ -32,7 +32,6 @@
 #include "Firestore/core/src/firebase/firestore/model/no_document.h"
 #include "Firestore/core/src/firebase/firestore/model/resource_path.h"
 #include "Firestore/core/src/firebase/firestore/nanopb/reader.h"
-#include "Firestore/core/src/firebase/firestore/nanopb/tag.h"
 #include "Firestore/core/src/firebase/firestore/nanopb/writer.h"
 #include "Firestore/core/src/firebase/firestore/timestamp_internal.h"
 #include "Firestore/core/src/firebase/firestore/util/hard_assert.h"
@@ -56,7 +55,6 @@ using firebase::firestore::model::ObjectValue;
 using firebase::firestore::model::ResourcePath;
 using firebase::firestore::model::SnapshotVersion;
 using firebase::firestore::nanopb::Reader;
-using firebase::firestore::nanopb::Tag;
 using firebase::firestore::nanopb::Writer;
 using firebase::firestore::util::Status;
 using firebase::firestore::util::StringFormat;