mac-virtualcam: Update locales

The plugin only uses one of the locales defined, the other ones can be removed.
This also makes the plugin actually use the one remaining string

plugins/mac-virtualcam/src/obs-plugin/data/locale/en-US.ini

-UnsupportedResolution_Title="Unsupported resolution"
-UnsupportedResolution_Main="Your output resolution not supported. Please use one of the following:"
-VirtualCamera_Start="Start Virtual Camera"
-VirtualCamera_Stop="Stop Virtual Camera"
 Plugin_Name="macOS Virtual Webcam"

plugins/mac-virtualcam/src/obs-plugin/plugin-main.mm

@@ -108,7 +108,7 @@ static bool check_dal_plugin()
 static const char *virtualcam_output_get_name(void *type_data)
 {
 	(void)type_data;
-	return obs_module_text("macOS Virtual Webcam");
+	return obs_module_text("Plugin_Name");
 }
 
 // This is a dummy pointer so we have something to return from virtualcam_output_create