* Disable Percy
While visual regression testing is without doubt an essential part of
quality assurance, the way we're currently using Percy brings little
to no value while causing mainenance overhead. Therefore, we're disabling it
until we have figure out https://github.com/vector-im/wat-internal/issues/36
and https://github.com/vector-im/wat-internal/issues/56.
* Also disable nightly build
* Comment out Percy step instead of fiddling with the output value
* Appease the frigging linter
7a56d61a9e