do not included unused style-loader dependency

Overview: Remove style-loader

Details: The local style-loader dependency is unused here and, to boot, conflicts with the version required by stripes-webpack. Because hoisting is non-deterministic (yay! SO FUN!) this means the 0.21 version here has the potential to be hoisted and found above the 1.0 version there.

Maybe we didn't have style-loader in our webpack config waaay back when and so it was necessary at the time. Regardless of the reason, we do not need it here, and do not want it here, now.