Remove Default URL to Builder.io in Figma Plugin

Absolutely love this plugin. It's an absolute gamechanger for me.

One piece of feedback, please remove the default builder.io url when you run the plugin. I can't tell you how many times I've accidently clicked import by accident for that URL (instead of uploading the .json or the right url) and then the plugin just locks up and I have to exit figma.

All accounted for this has easily taken up at least a few hours of my time and taken me out of my design state.

I know it's my fault, but you need to account for idiots like me who don't think before they push buttons.