bug#36565: [PATCH] Suppress interactive-only warnings in undo-tests.el

[Stefan Kangas]

This patch fixes these warnings in make check:

  ELC      src/undo-tests.elc

In toplevel form:
src/undo-tests.el:262:6:Warning: `delete-forward-char' is for interactive use
    only; use `delete-char' instead.
src/undo-tests.el:317:6:Warning: `delete-forward-char' is for interactive use
    only; use `delete-char' instead.
src/undo-tests.el:353:47:Warning: `delete-forward-char' is for interactive use
    only; use `delete-char' instead.
src/undo-tests.el:370:13:Warning: `delete-forward-char' is for interactive use
    only; use `delete-char' instead.
src/undo-tests.el:394:19:Warning: `delete-forward-char' is for interactive use
    only; use `delete-char' instead.
src/undo-tests.el:433:11:Warning: `delete-forward-char' is for interactive use
    only; use `delete-char' instead.

(I'll send the patch in a separate message once this is assigned a bug
number.)

Thanks,
Stefan Kangas