Enable code generation of custom options in C++ lite

PiperOrigin-RevId: 524037847

src/google/protobuf/compiler/cpp/extension.cc

@@ -142,16 +142,6 @@ void ExtensionGenerator::GenerateDeclaration(io::Printer* printer) const {
 }
 
 void ExtensionGenerator::GenerateDefinition(io::Printer* printer) {
-  // If we are building for lite with implicit weak fields, we want to skip over
-  // any custom options (i.e. extensions of messages from descriptor.proto).
-  // This prevents the creation of any unnecessary linker references to the
-  // descriptor messages.
-  if (options_.lite_implicit_weak_fields &&
-      descriptor_->containing_type()->file()->name() ==
-          "net/proto2/proto/descriptor.proto") {
-    return;
-  }
-
   Formatter format(printer, variables_);
   std::string default_str;
   // If this is a class member, it needs to be declared in its class scope.