deduplicate redundant defaulting

[philipmulcahy]

In order_details.ts there are several instances where a call to extraction.y_regex is wrapped with a call to util.defaulted

return util.defaulted(
   extraction.by_regex(
       ...,

Given that by_regex has a default parameter, this seems redundant.

Proposal: remove the defaulted wrapper, copying the outer default value to the by_regex call, replacing the existing inner default parameter if it differs.