[poppler] [patch] Remove version check

[Kristian Høgsberg]

Brad Hards wrote:
> The poppler version check is:
> 1. Noisy and annoying, and confusing (#5217, 
> https://bugs.freedesktop.org/show_bug.cgi?id=5217)
> 2. Useless - because it probably won't be visible to the GUI apps we're 
> targetting, and it doesn't help you deal with the problem or require any 
> action.
> 3. Incorrect - because we don't really support all of PDF 1.5, and we do 
> support things that are from 1.6 (IIRC)
...
> OK to commit?

Yeah, it's doing more harm than good, let's loose it.

Kristian