MiG-15 bug fix: make it appear in the 3D preview of fgrun
Thanks to Brendan Black for spotting an object 4445 metres away from
the model in Models/Instruments/Gearhandles/MiG-15bis-Gearhandles.ac.
This object, "EG_RBolt.002", is never referenced anywhere in the XML
files, so remove it.