remove combined {models,sprites}.mat, remove extra .mdl .spr exts

gearbox/pbr/models/v_knife.mdl/v_knife.mat

@@ -0,0 +1,32 @@
+
+{
+"for" "#models/v_knife/fatigues.mdl"
+//"basecolor_map" "fatigues.png"
+//"normal_map" "fatigues_normal.png"
+//"metal_map" "fatigues_metal.png"
+//"roughness_map" "fatigues_roughness.png"
+}
+
+{
+"for" "#models/v_knife/hand.mdl"
+//"basecolor_map" "hand.png"
+//"normal_map" "hand_normal.png"
+//"metal_map" "hand_metal.png"
+//"roughness_map" "hand_roughness.png"
+}
+
+{
+"for" "#models/v_knife/knife_blade.mdl"
+//"basecolor_map" "knife_blade.png"
+//"normal_map" "knife_blade_normal.png"
+//"metal_map" "knife_blade_metal.png"
+//"roughness_map" "knife_blade_roughness.png"
+}
+
+{
+"for" "#models/v_knife/skin.mdl"
+//"basecolor_map" "skin.png"
+//"normal_map" "skin_normal.png"
+//"metal_map" "skin_metal.png"
+//"roughness_map" "skin_roughness.png"
+}