[turbofan] Remove obsolete --turbo-try-catch flag.

[turbofan] Remove obsolete --turbo-try-catch flag.

This removes the aforementioned flag which has been on by default for a
while now. Note that this does not control optimization decisions, only
the last-resort bailout in the graph builder.

R=bmeurer@chromium.org

Committed: https://crrev.com/a676da3ae0261a946f1cd8243286c3d5426ac80e
Cr-Commit-Position: refs/heads/master@{#30673}

[Michael Starzinger, 2015-09-10 09:13:48]

Where we are going, we don't need no flags. :)

[Benedikt Meurer, 2015-09-10 09:14:16]

LGTM! Ship it!

[Michael Starzinger, 2015-09-10 09:15:18]

The CQ bit was checked by mstarzinger@chromium.org

[commit-bot: I haz the power, 2015-09-10 09:15:29]

CQ is trying da patch. Follow status at
 https://chromium-cq-status.appspot.com/patch-status/1335543002/1
View timeline at
 https://chromium-cq-status.appspot.com/patch-timeline/1335543002/1

[commit-bot: I haz the power, 2015-09-10 09:38:34]

Committed patchset #1 (id:1)

[commit-bot: I haz the power, 2015-09-10 09:38:51]

Patchset 1 (id:??) landed as
https://crrev.com/a676da3ae0261a946f1cd8243286c3d5426ac80e
Cr-Commit-Position: refs/heads/master@{#30673}