delete unused
Merge branch 'master' of github.com:crosslife/UnityBird

Conflicts:
	Library/CurrentLayout.dwlt
	Library/InspectorExpandedItems.asset
	Library/assetDatabase3
	Library/expandedItems
	Library/guidmapper
	Library/metadata/10/105ab383fe00e1146a2ba88821832c8a
	Library/metadata/23/23ca2400cc47bad4d8a53803b4918df6
	Library/metadata/23/23d388efcfb15e045a2ad51d8d715652
	Library/metadata/33/33dd61d30aae28b428b3bebdf65c4c84
	Library/metadata/3a/3ab69b75965deaa44b2564afa36bdf6a
	Library/metadata/68/68fbc44b58bf307458061805fd55fbb2
	Library/metadata/81/81f65794caeaab34b8a683acbd2817c7