Bug 88838 [Undo] - API cleanup - remove IContextConsultingOperationApprover
Early on this was involved in scenarios where editors examined other operations. This is no longer used. Operation approvers generally apply to all contexts and are installed at the OperationHistory level. Until there is a concrete need for this API it should be removed. It is gratuitous at this point.
bundles/org.eclipse.core.commands/src/org/eclipse/core/commands/operations/DefaultOperationHistory.java
redoList.remove(operation);
			internalRemove(operation);
		}
	}
	/*
	 * (non-Javadoc)
	 * 
	 * @see org.eclipse.core.commands.operations.IOperationHistory#removeOperationApprover(org.eclipse.core.commands.operations.IOperationApprover)
	 */
	public void removeOperationApprover(IOperationApprover approver) {
		approvers.remove(approver);
	}
	/*
	 * (non-Javadoc)
	 * 
	 * @see org.eclipse.core.commands.operations.IOperationHistory#removeOperationHistoryListener(org.eclipse.core.commands.operations.IOperationHistoryListener)
	 */
	public void removeOperationHistoryListener(
			IOperationHistoryListener listener) {
		listeners.remove(listener);
	}
	/*
	 * (non-Javadoc)
	 * 
	 * @see org.eclipse.core.commands.operations.IOperationHistory#setLimit(org.eclipse.core.commands.operations.IUndoContext, int)
	 */
	public void setLimit(IUndoContext context, int limit) {
		Assert.isTrue(limit > 0);
		/*
		 * The limit checking methods interpret a null context as a global limit to be