Remove StarGenerator reps from StFwdTrackMaker

[jdbrice]

@@ -1721,6 +1723,9 @@ Bfc_st BFC[] = { // standard chains
  {"FwdTrack","","","fcsDb","StFwdTrackMaker",
   "XMLIO,genfit2,KiTrack,StarGeneratorUtil,libMathMore,StEventUtilities,StEpdUtil,StFwdTrackMaker",

@klendathu2k mentioned in PR 759

When this was first integrated it was really a simulator + tracker all together. This dependency should be (probably can be) removed. Just need to test that removing it from BFC option still allows the StFwdTrackMaker.so to load