Remove old iOS porting files.

Remove old iOS porting files.

These files do not appear to be used, are unfinished, and should be
redundant with the mac porting files.

Committed: https://skia.googlesource.com/skia/+/3fdde4e129f43b9d2f0c31a791ebe17ff06e4612

[bungeman-skia, 2015-06-22 18:14:35]

The CQ bit was checked by bungeman@google.com to run a CQ dry run

[commit-bot: I haz the power, 2015-06-22 18:14:58]

Dry run: CQ is trying da patch. Follow status at
 https://chromium-cq-status.appspot.com/patch-status/1197963003/1

[bungeman-skia, 2015-06-22 18:17:40]

bungeman@google.com changed reviewers:
+ bsalomon@google.com, mtklein@google.com, reed@google.com

[mtklein, 2015-06-22 18:19:18]

lgtm

[commit-bot: I haz the power, 2015-06-22 18:19:50]

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

[commit-bot: I haz the power, 2015-06-22 18:19:51]

Dry run: This issue passed the CQ dry run.

[bungeman-skia, 2015-06-22 18:24:08]

Just wanted to point out that iOS should be (and is) using the equivalent '_mac'
versions of these ports. There's no need to write these sorts of things multiple
times as they're all built around the same frameworks.

[reed1, 2015-06-29 20:45:50]

lgtm

[bungeman-skia, 2015-06-29 21:00:19]

The CQ bit was checked by bungeman@google.com

[commit-bot: I haz the power, 2015-06-29 21:00:46]

CQ is trying da patch. Follow status at
 https://chromium-cq-status.appspot.com/patch-status/1197963003/1

[commit-bot: I haz the power, 2015-06-29 21:12:48]

Committed patchset #1 (id:1) as
https://skia.googlesource.com/skia/+/3fdde4e129f43b9d2f0c31a791ebe17ff06e4612