Remove mention of plugin groups flag

Since there's no reason for this to be behind a flag.

src/plugin/configuration.cpp

@@ -67,6 +67,5 @@ Configuration Configuration::load_for(const fs::path& yabridge_path) {
         return Configuration();
     }
 
-    // TODO: Disable plugin groups when not compiling with plugin group support
     return Configuration(config_file.value(), yabridge_path);
 }

src/plugin/plugin-bridge.cpp

@@ -676,7 +676,6 @@ void PluginBridge::log_init_message() {
 
     // Include a list of enabled compile-tiem features, mostly to make debug
     // logs more useful
-    // TODO: Add a feature flag for the plugin group support
     init_msg << "Enabled features:" << std::endl;
 #ifdef USE_BITBRIDGE
     init_msg << "- bitbridge support" << std::endl;