warning-suppress-types

warning-suppress-types is a variable defined in `warnings.el'.
Its value is

nil

Documentation:
List of warning types not to display immediately.
If any element of this list matches the TYPE argument to `display-warning',
the warning is logged nonetheless, but the warnings buffer is
not immediately displayed.
The element must match an initial segment of the list TYPE.
Thus, (foo bar) as an element matches (foo bar)
or (foo bar ANYTHING...) as TYPE.
If TYPE is a symbol FOO, that is equivalent to the list (FOO),
so only the element (FOO) will match it.
See also `warning-suppress-log-types'.

You can customize this variable.

This variable was introduced, or its default value was changed, in version 22.1 of Emacs.