tests: Update test_double() after e65c1248
tests: Update test_double() after e65c1248

Commit e65c1248 introduced support for NaN and ±inf as valid float values,
rendering the "expect ValueError on 2*double" check broken. Just remove it.

GNOME/pygobject,davibe/pygobject,sfeltman/pygobject,sfeltman/pygobject,pexip/pygobject,GNOME/pygobject,GNOME/pygobject,davibe/pygobject,sfeltman/pygobject,davibe/pygobject,pexip/pygobject,pexip/pygobject,davibe/pygobject