remove docker fireplace development lines from commonplace template (bug 1073617)

@muffinresearch and I talked about the purpose of Fireplace within Docker being allowing someone to see stuff working and poke around, rather than have it be a development environment since it is dead easy/faster/simpler to set up a Commonplace project manually (git clone, make init, make serve). There will be updates to docs.

With that in mind, we can remove these development lines from the Commonplace index.html. Notably since we don't care whether the CSS/JS is minified (we'll have source maps anyways). Fireplace has been patched to automatically generate these bundles on Docker so they will exist.