Telemetry: remove the heap snapshot half-feature.

Telemetry: remove the heap snapshot half-feature.

It was never really taken into use (it was meant to be used by external tools
but we never figured out how they should interact w/ Telemetry) and it's out of
date.

BUG=274456
R=skyostil@chromium.org

Committed: https://crrev.com/a220c3513768558e8359726af125cbf8e504a727
Cr-Commit-Position: refs/heads/master@{#318703}

[marja, 2015-02-26 16:21:43]

ptal

(are there telemetry tryjobs so that i could actually notice if i got this
wrong?)

[Sami, 2015-02-26 19:10:32]

Yay, red patch. lgtm, but looks like you need a rebase. The telemetry smoke and
unit tests should be running on the default try bots and should give us some
confidence that this works.

[marja, 2015-03-02 13:54:53]

The CQ bit was checked by marja@chromium.org

[marja, 2015-03-02 13:54:53]

The patchset sent to the CQ was uploaded after l-g-t-m from
skyostil@chromium.org
Link to the patchset: https://codereview.chromium.org/962673002/#ps20001 (title:
"rebased")

[commit-bot: I haz the power, 2015-03-02 13:55:31]

CQ is trying da patch. Follow status at
 https://chromium-cq-status.appspot.com/patch-status/962673002/20001

[commit-bot: I haz the power, 2015-03-02 14:57:21]

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

[commit-bot: I haz the power, 2015-03-02 14:57:22]

Try jobs failed on following builders:
  linux_chromium_rel_ng on tryserver.chromium.linux (JOB_FAILED,
http://build.chromium.org/p/tryserver.chromium.linux/builders/linux_chromium_...)

[marja, 2015-03-02 15:02:13]

The CQ bit was checked by marja@chromium.org

[marja, 2015-03-02 15:02:14]

The patchset sent to the CQ was uploaded after l-g-t-m from
skyostil@chromium.org
Link to the patchset: https://codereview.chromium.org/962673002/#ps40001 (title:
"oops")

[commit-bot: I haz the power, 2015-03-02 15:03:39]

CQ is trying da patch. Follow status at
 https://chromium-cq-status.appspot.com/patch-status/962673002/40001

[commit-bot: I haz the power, 2015-03-02 16:00:18]

Committed patchset #3 (id:40001)

[commit-bot: I haz the power, 2015-03-02 16:00:52]

Patchset 3 (id:??) landed as
https://crrev.com/a220c3513768558e8359726af125cbf8e504a727
Cr-Commit-Position: refs/heads/master@{#318703}