print: Remove invalid @supports condition.
print: Remove invalid @supports condition.

@supports() is not supposed to report support for page descriptors, this is
depending on a Chromium bug, which doesn't treat as invalid:

```
<div style="size: 1pt 1pt">
```

Even though it should. That is
https://bugs.chromium.org/p/chromium/issues/detail?id=1079214

There's no need to use @supports for this. If the descriptor is not accepted it
will just be ignored.

That way, when Firefox implements @page { size }, which is in progress, it will
get the right behavior.

showpad/mozilla-pdf.js,Snuffleupagus/pdf.js,Shoobx/pdf.js,Shoobx/pdf.js,showpad/mozilla-pdf.js,mozilla/pdf.js,timvandermeij/pdf.js,Shoobx/pdf.js,nawawi/pdf.js,showpad/mozilla-pdf.js,timvandermeij/pdf.js,macroplant/pdf.js,nawawi/pdf.js,Snuffleupagus/pdf.js,nawawi/pdf.js,xavier114fch/pdf.js,macroplant/pdf.js,mozilla/pdf.js,xavier114fch/pdf.js,Snuffleupagus/pdf.js,mozilla/pdf.js,macroplant/pdf.js,timvandermeij/pdf.js