errors: remove source map rekey logic
The rekeying logic no longer seems to be necessary to ensure that source maps are written to disk before the application exits.
Fixes #38945 (closed)
I believe improvements could be made to both this class of error and to the error described in #39017, such that we try to still annotate the stack trace with the original call site. But, in both cases, I think it's good to land the obvious fix initially.
What we ultimately lose with source-maps enabled is the syntactic sugar of:
/Users/bencoe/oss/node-1/test/fixtures/source-map/throw-string.js:1
function Hello(){throw"goodbye"}Hello();
^
Which I don't think is standard stack trace output any ways.