Remove unneeded dependencies from Dockerfiles

[Tetrino]

The dependencies in question were removed from the remote repos, and are no longer required for Chromium to build.

Removing them outright is safe to do, and does not affect any development environment.

Associated issue: #508 - To test that this PR works, you can clear the cache by running docker builder prune in the govuk-docker folder.

[Tetrino]

@kevindew This doesn't have to be pulled in, but as far as I can tell through looking, Chromium just doesn't need these anymore, nor does it affect our environment.

[ChrisBAshton]

@Tetrino I wasn't able to test this by running docker builder prune (that only freed up 1.4KB, and the make whitehall command continued to use cached build steps).

But what I did do was check out the main branch of govuk-docker, and then add the --no-cache flag to the main Makefile. I then ran make whitehall (after running govuk-docker down on Whitehall in another terminal). The make succeeded - am I missing something?

[Tetrino]

@ChrisBAshton It is possible they returned the dependencies to the repo, or updated them. I will need to find extra time to test them when possible.

[kevindew]

Thanks very much @Tetrino for digging into this, apologies I didn't notice this earlier

I too had the problem that docker builder prune didn't work, as that only removed dangling images. I think docker image prune -a will do the trick (but does nuke everything be warned).

Have you tested some projects can still run Chrome ok? I gave this ago myself and I'm pretty confident it works. I was able to run some JS Content Publisher feature tests (I did hit a different annoying issue in Content Publisher where image copying fails identify-im6.q16: insufficient image data in file /tmp/mini_magick20210908-143-1b7oecp.jpg' @ error/jpeg.c/ReadJPEGImage_/1166.` 🤔 but I think that is unrelated)

[kevindew]

Suggested change

RUN apt-get update -qq && apt-get install -y

We can remove this line (same with the other Dockerfiles changed here) as it is no longer installing any software with apt

[Tetrino]

Just raising that I've not forgotten about this, I am snowed under with some pretty hefty work and as this isn't affecting most people I've put it to the side just for now.

[kevindew]

Superseded by #513