Remove XEmacs compat code from calc

* lisp/calc/calc.el (calc-read-key-sequence)
(calcDigit-start, calc-read-key, calc-unread-command)
(calc-clear-unread-commands):
* lisp/calc/calc-misc.el (calc-dispatch-help):
* lisp/calc/calc-help.el (calc-help-for-help)
(calc-describe-key):
* lisp/calc/calc-ext.el (calc-fancy-prefix, calc-user-key-map):
Remove XEmacs compat code.
1 job for master in 90 minutes and 1 second (queued for 3 seconds)
Status Job ID Name Coverage
  Test
failed #2294
test-all

01:30:01

 
Name Stage Failure
failed
test-all Test The script exceeded the maximum execution time set for the job
make -C test check-expensive
make[1]: Entering directory '/builds/emacs/emacs/test'
rm -f ./*.tmp
make[2]: Entering directory '/builds/emacs/emacs/test'
make[3]: Entering directory '/builds/emacs/emacs/test'
ELC lisp/net/tramp-tests.elc
GEN lisp/net/tramp-tests.log
Pulling docker image gitlab/gitlab-runner-helper:x86_64-f100a208 ...
ERROR: Job failed: execution took longer than 1h30m0s seconds