fix build to remove file that no longer exists in upb

gRPC-C++.podspec

@@ -643,7 +643,6 @@ Pod::Spec.new do |s|
                       'src/cpp/util/time_cc.cc',
                       'third_party/upb/upb/decode.h',
                       'third_party/upb/upb/encode.h',
-                      'third_party/upb/upb/generated_util.h',
                       'third_party/upb/upb/msg.h',
                       'third_party/upb/upb/port_def.inc',
                       'third_party/upb/upb/port_undef.inc',
@@ -1028,7 +1027,6 @@ Pod::Spec.new do |s|
                               'src/cpp/thread_manager/thread_manager.h',
                               'third_party/upb/upb/decode.h',
                               'third_party/upb/upb/encode.h',
-                              'third_party/upb/upb/generated_util.h',
                               'third_party/upb/upb/msg.h',
                               'third_party/upb/upb/port_def.inc',
                               'third_party/upb/upb/port_undef.inc',

gRPC-Core.podspec

@@ -970,7 +970,6 @@ Pod::Spec.new do |s|
                       'third_party/upb/upb/decode.h',
                       'third_party/upb/upb/encode.c',
                       'third_party/upb/upb/encode.h',
-                      'third_party/upb/upb/generated_util.h',
                       'third_party/upb/upb/msg.c',
                       'third_party/upb/upb/msg.h',
                       'third_party/upb/upb/port.c',
@@ -1346,7 +1345,6 @@ Pod::Spec.new do |s|
                               'src/core/tsi/transport_security_interface.h',
                               'third_party/upb/upb/decode.h',
                               'third_party/upb/upb/encode.h',
-                              'third_party/upb/upb/generated_util.h',
                               'third_party/upb/upb/msg.h',
                               'third_party/upb/upb/port_def.inc',
                               'third_party/upb/upb/port_undef.inc',

grpc.gemspec

@@ -1534,7 +1534,6 @@ Gem::Specification.new do |s|
   s.files += %w( third_party/upb/upb/decode.h )
   s.files += %w( third_party/upb/upb/encode.c )
   s.files += %w( third_party/upb/upb/encode.h )
-  s.files += %w( third_party/upb/upb/generated_util.h )
   s.files += %w( third_party/upb/upb/msg.c )
   s.files += %w( third_party/upb/upb/msg.h )
   s.files += %w( third_party/upb/upb/port.c )

package.xml

@@ -1462,7 +1462,6 @@
     <file baseinstalldir="/" name="third_party/upb/upb/decode.h" role="src" />
     <file baseinstalldir="/" name="third_party/upb/upb/encode.c" role="src" />
     <file baseinstalldir="/" name="third_party/upb/upb/encode.h" role="src" />
-    <file baseinstalldir="/" name="third_party/upb/upb/generated_util.h" role="src" />
     <file baseinstalldir="/" name="third_party/upb/upb/msg.c" role="src" />
     <file baseinstalldir="/" name="third_party/upb/upb/msg.h" role="src" />
     <file baseinstalldir="/" name="third_party/upb/upb/port.c" role="src" />

src/upb/gen_build_yaml.py

@@ -43,7 +43,6 @@ try:
         'headers': [
             "third_party/upb/upb/decode.h",
             "third_party/upb/upb/encode.h",
-            "third_party/upb/upb/generated_util.h",
             "third_party/upb/upb/msg.h",
             "third_party/upb/upb/port_def.inc",
             "third_party/upb/upb/port_undef.inc",