Delete pdfium fetch recipe

Delete pdfium fetch recipe

It's incorrect - the checkout it creates is unusable for pdfium
development.

Correct instructions are here:
https://code.google.com/p/pdfium/wiki/Build

BUG=510419
R=phajdan.jr@chromium.org

Committed: http://src.chromium.org/viewvc/chrome?view=rev&revision=296946

[jochen (gone - plz use gerrit), 2015-09-30 11:18:35]

The CQ bit was checked by jochen@chromium.org to run a CQ dry run

[commit-bot: I haz the power, 2015-09-30 11:18:50]

Dry run: CQ is trying da patch. Follow status at
 https://chromium-cq-status.appspot.com/patch-status/1382543002/1
View timeline at
 https://chromium-cq-status.appspot.com/patch-timeline/1382543002/1

[commit-bot: I haz the power, 2015-09-30 11:20:43]

The CQ bit was unchecked by commit-bot@chromium.org

[commit-bot: I haz the power, 2015-09-30 11:20:44]

Dry run: This issue passed the CQ dry run.

[Paweł Hajdan Jr., 2015-09-30 11:34:14]

LGTM

[jochen (gone - plz use gerrit), 2015-09-30 11:34:31]

The CQ bit was checked by jochen@chromium.org

[commit-bot: I haz the power, 2015-09-30 11:34:45]

CQ is trying da patch. Follow status at
 https://chromium-cq-status.appspot.com/patch-status/1382543002/1
View timeline at
 https://chromium-cq-status.appspot.com/patch-timeline/1382543002/1

[commit-bot: I haz the power, 2015-09-30 11:36:28]

Committed patchset #1 (id:1) as
http://src.chromium.org/viewvc/chrome?view=rev&revision=296946