Sync from Piper @mkruskal/protobuf-absl

PROTOBUF_SYNC_PIPER

Protobuf-C++.podspec

diff --git a/Protobuf-C++.podspec b/Protobuf-C++.podspec
index 8ab70d0..55d6d1b 100644
--- a/Protobuf-C++.podspec
+++ b/Protobuf-C++.podspec
@@ -1,6 +1,6 @@
 Pod::Spec.new do |s|
   s.name     = 'Protobuf-C++'
-  s.version  = '3.21.6'
+  s.version  = '3.21.7'
   s.summary  = 'Protocol Buffers v3 runtime library for C++.'
   s.homepage = 'https://github.com/google/protobuf'
   s.license  = 'BSD-3-Clause'
@@ -13,8 +13,7 @@
   s.source_files = 'src/google/protobuf/*.{h,cc,inc}',
                    'src/google/protobuf/stubs/*.{h,cc}',
                    'src/google/protobuf/io/*.{h,cc}',
-                   'src/google/protobuf/util/*.{h,cc}',
-                   'src/google/protobuf/util/internal/*.{h,cc}'
+                   'src/google/protobuf/util/*.{h,cc}'
 
   # Excluding all the tests in the directories above
   s.exclude_files = 'src/google/**/*_test.{h,cc,inc}',