Clean up golog++ parameter mapping API

[todo]

fawkes/src/plugins/gologpp/exog_manager.cpp

Lines 146 to 151 in 3974541

	/* TODO: This is not very nice. First we have to look up the index of the
	* mapped parameter variable and then remember to put arg values at that
	* index when an actual event happens. This is necessary because the
	* ExogEvent (or rather the ReferenceBase) constructor accepts only vectors
	* with positional arguments.
	*/

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This issue was generated by todo based on a TODO comment in 3974541 when #176 was merged. cc @fawkesrobotics.

[stale]

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