Removing data from a Geodatabase

I have looked through my current AshevilleBikeMap.gdb and it seems I have many Feature Classes I do not need, or choose not to use for my final map.  Wow, kind of crazy the amount of time I took building some of these Feature Classes because I thought I wanted to use them.  Realize I should have practiced more with the data to determine if it would or would not "fit" into my map presentation.  Wish I would have moved the feature class from the geodatabase as soon as I decided not to use it.  Now I can not remember what some of these classes were when I created them 6 weeks ago.  I feel sure I do not need, yet I am scared to start deleting away the following classes:
BikeCompPlan

BikeRouteNamesAnno
BuncombeBikeShopsAnno
BuncombeBikeShopsAnno2
BuncombeBikeShopsAnno3
BuncombeCountyCensusAddress
BuncombeHydroPolyAnno2
BuncombeHydroPolyAnno3
BuncombeMajorRoads
BuncombeMedicalSites
BuncombeMedicalSites_Clip
BuncombeMedicalSites_Clip1
Contour100foot
Contour20foot
Contour4foot
Lakes__Rivers__Streams_selectionAnnoMeter
NCStateRd
NCStreetsFoot
Political_BoundaryAnno
StateOwnedLand
Streams
Updated_Asheville_Bike_Racks
Waterbody