[eclipse-pmc] API Change: Removal of action id constants that were added

[Michael Valenta <Michael_Valenta@xxxxxxxxxx>]

In order to allow Team/CVS to move to the new menu
story, we need to remove 3 action id constants for local history related
operations that were added in 3.3. To date, there have been no known cases
of this API being adopted. The API was added to Team because it was used
by CVS but, with a switch to the new menu story, the overriding of the
local history actions will occur at the handler level and will be done
using enablement expressions.

If this API is left in, Team/CVS will not be able
to move completely to the new menu story since objectContribution overriding
is not supported by the menus extension point in 3.3.

GOALS/BENEFITS:
- Team/CVS can move their popupMenus to the new menu story

CORRESPONDING BUG:
- Remove objectContribution action ids from API
     https://bugs.eclipse.org/bugs/show_bug.cgi?id=176024

RISKS:
No known risks.

PERFORMANCE IMPACTS:
- none

Michael