Revert "Generate some of the C++ bindings for mojom tagged unions."

mojo/public/tools/bindings/generators/cpp_templates/module.cc.tmpl

Index: mojo/public/tools/bindings/generators/cpp_templates/module.cc.tmpl
diff --git a/mojo/public/tools/bindings/generators/cpp_templates/module.cc.tmpl b/mojo/public/tools/bindings/generators/cpp_templates/module.cc.tmpl
index 96fa4f9765251a12a5128213cafa13908a07e530..1ddcc45c39dde0f3b5a783901c988ec10c8a0942 100644
--- a/mojo/public/tools/bindings/generators/cpp_templates/module.cc.tmpl
+++ b/mojo/public/tools/bindings/generators/cpp_templates/module.cc.tmpl
@@ -24,7 +24,6 @@
 #include "mojo/public/cpp/bindings/lib/string_serialization.h"
 #include "mojo/public/cpp/bindings/lib/validate_params.h"
 #include "mojo/public/cpp/bindings/lib/validation_errors.h"
-#include "mojo/public/cpp/bindings/lib/union_accessor.h"
 #include "mojo/public/cpp/environment/logging.h"
 
 {%- for namespace in namespaces_as_array %}
@@ -64,11 +63,6 @@ const uint32_t {{method_name}} = {{method.ordinal}};
 {%-   include "struct_definition.tmpl" %}
 {%- endfor %}
 
-{#--- Union definitions #}
-{%  for union in unions %}
-{%-   include "union_definition.tmpl" %}
-{%- endfor %}
-
 }  // namespace internal
 
 {#--- Struct Constants #}
@@ -83,11 +77,6 @@ const {{constant.kind|cpp_pod_type}} {{struct.name}}::{{constant.name}} = {{cons
 {%-   include "wrapper_class_definition.tmpl" %}
 {%- endfor %}
 
-{#--- Union builder definitions #}
-{%- for union in unions %}
-{%-   include "wrapper_union_class_definition.tmpl" %}
-{%- endfor %}
-
 {#--- Interface definitions #}
 {%- for interface in interfaces %}
 {%-   include "interface_definition.tmpl" %}
@@ -98,11 +87,6 @@ const {{constant.kind|cpp_pod_type}} {{struct.name}}::{{constant.name}} = {{cons
 {%-   include "struct_serialization_definition.tmpl" %}
 {%- endfor %}
 
-{#--- Union Serialization Helpers #}
-{%- for union in unions %}
-{%-   include "union_serialization_definition.tmpl" %}
-{%- endfor %}
-
 {%- for namespace in namespaces_as_array|reverse %}
 }  // namespace {{namespace}}
 {%- endfor %}