Remove deprecated Chrome OS action.

Cryptohome does not report this action. We can remove it from
extract_actions.py.
The action is also marked as deprecated in actions.xml.

BUG=560497

Review URL: https://codereview.chromium.org/1470083002

Cr-Commit-Position: refs/heads/master@{#361210}

tools/metrics/actions/actions.xml

@@ -2503,6 +2503,7 @@ should be able to be added at any place in this file.
 <action name="Cryptohome.PKCS11InitFail">
   <owner>Please list the metric's owners. Add more owner tags as needed.</owner>
   <description>Please enter the description of this user action.</description>
+  <obsolete>Deprecated as of 11/2015.</obsolete>
 </action>
 
 <action name="CustomTabsCustomActionButtonClick">

tools/metrics/actions/extract_actions.py

@@ -295,9 +295,6 @@ def AddChromeOSActions(actions):
   actions.add('Updater.ServerCertificateChanged')
   actions.add('Updater.ServerCertificateFailed')
 
-  # Actions sent by Chrome OS cryptohome.
-  actions.add('Cryptohome.PKCS11InitFail')
-
 def AddExtensionActions(actions):
   """Add actions reported by extensions via chrome.metricsPrivate API.