[dvipdfmx] PK fonts - revert redundant changes

[Igor Liferenko]

Dear Akira,

> It is the feature introduced in the original dvipdfm by M. A. Wicks.

For compatibility with original we may use "compat" mode,
or we can add conf-file option, environment variable, command-line
option to enable new behavior.

> ... it is better to leave the feature
> intact in order not to introduce new bugs.

I can help with testing.

Best,
Igor

P.S.
https://tug.org/pipermail/tex-k/2021-February/003454.html