No embedded Polymer

Please remove Polymer as embedded library and add it as an optional dependency.
Polymer is way too complicated mod for being used just as an embedded library, and can mess up server configuration. It's a server choice, not mod's choice that cannot be changed.

It has it's own implementations that could be unneeded or undesired, and thus needs additional config tinkering with something we don't need to or even cannot disable at all. Thank you.

Start by inspecting the dependency and mod configuration for the embedded Polymer integration. Trace where Polymer is bundled or initialized, then verify that it is no longer embedded and can instead be supplied as an optional dependency without requiring unwanted server configuration.

Written by the indexing model from the issue text.