Revert of Add pretty printing for rappor.xml

Revert of Add pretty printing for rappor.xml (patchset #4 id:60001 of https://codereview.chromium.org/925753002/)

Reason for revert:
This breaks extract_actions.py.

$ tools/metrics/actions/extract_actions.py
Traceback (most recent call last):
  File "tools/metrics/actions/extract_actions.py", line 852, in <module>
    sys.exit(main(sys.argv))
  File "tools/metrics/actions/extract_actions.py", line 848, in main
    presubmit_util.DoPresubmitMain(argv, 'actions.xml', 'actions.old.xml',
NameError: global name 'presubmit_util' is not defined

Original issue's description:
> Add pretty printing for rappor.xml
> 
> BUG=381380
> 
> Committed: https://crrev.com/3edb8729b72e1b1c77cda6d2431094079d2a8fad
> Cr-Commit-Position: refs/heads/master@{#316634}

TBR=asvitkine@chromium.org,holte@chromium.org
NOPRESUBMIT=true
NOTREECHECKS=true
NOTRY=true
BUG=381380

[falken, 2015-02-18 02:20:42]

Created Revert of Add pretty printing for rappor.xml

[falken, 2015-02-18 02:20:46]

The CQ bit was unchecked by falken@chromium.org

[falken, 2015-02-18 02:37:49]

On 2015/02/18 02:20:42, falken wrote:
> Created Revert of Add pretty printing for rappor.xml

Closed as a fix is in the CQ.