bug#65267: 30.0.50; modifying debug-ignored-errors during startup with --debug-init is broken, bug#65267: 30.0.50; modifying debug-ignored-errors during startup with --debug-init is broken

[Gregory Heytings]

> > (delq 'end-of-file debug-ignored-errors)
>
> Maybe you know something about `delq' I do not, but I always use 
> something like
>
> (setq debug-ignored-errors (delq 'end-of-file debug-ignored-errors))
>
> instead.  (See the documentation of `delq'.)

Indeed it's safer to write it that way, but the setq is in fact necessary 
only when the element you want to remove is the first element of the list, 
which isn't the case here.