Revert of Linux: Depend on liberation-fonts package for RPMs.

Revert of Linux: Depend on liberation-fonts package for RPMs. (patchset #1 id:1 of https://codereview.chromium.org/1358903005/ )

Reason for revert:
Fedora 21 is still broken.

Original issue's description:
> Linux: Depend on liberation-fonts package for RPMs.
>
> The previous try in r342645 was reverted because Fedora did not have a
> liberation-fonts virtual package. Fedora has since added the missing
> virtual pacakge per our request to supported distros - Fedora 21 and
> newer.
>
> So now we can fix the mismatch vs .debs, which added this dependency in
> r342854.
>
> BUG=369991
>
> Committed: https://crrev.com/a6df68559fd91f3bf3273c5e46d1c6a7b2132b8c
> Cr-Commit-Position: refs/heads/master@{#350101}

TBR=mmoss@chromium.org
NOPRESUBMIT=true
NOTREECHECKS=true
NOTRY=true
BUG=369991
Committed: https://crrev.com/a103bac9350268c02dea6ab15a54e5eda9e2afb8
Cr-Commit-Position: refs/heads/master@{#351261}

[Lei Zhang, 2015-09-29 05:54:15]

Created Revert of Linux: Depend on liberation-fonts package for RPMs.

[commit-bot: I haz the power, 2015-09-29 05:54:34]

CQ is trying da patch. Follow status at
 https://chromium-cq-status.appspot.com/patch-status/1380473002/1
View timeline at
 https://chromium-cq-status.appspot.com/patch-timeline/1380473002/1

[commit-bot: I haz the power, 2015-09-29 05:55:23]

Committed patchset #1 (id:1)

[commit-bot: I haz the power, 2015-09-29 05:56:03]

Patchset 1 (id:??) landed as
https://crrev.com/a103bac9350268c02dea6ab15a54e5eda9e2afb8
Cr-Commit-Position: refs/heads/master@{#351261}