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

cstrike/pbr/models/v_knife.mdl/v_knife.mat

@@ -0,0 +1,35 @@
+
+{
+"for" "#models/v_knife/knifeskin.mdl"
+"base_color" "2 2 2" // TODO: remove hack
+//"basecolor_map" "knifeskin.png"
+//"normal_map" "knifeskin_normal.png"
+//"metal_map" "knifeskin_metal.png"
+//"roughness_map" "knifeskin_roughness.png"
+"metalness" "1"
+"roughness" "0"
+}
+
+{
+"for" "#models/v_knife/view_finger.mdl"
+//"basecolor_map" "view_finger.png"
+//"normal_map" "view_finger_normal.png"
+//"metal_map" "view_finger_metal.png"
+//"roughness_map" "view_finger_roughness.png"
+}
+
+{
+"for" "#models/v_knife/view_glove.mdl"
+//"basecolor_map" "view_glove.png"
+//"normal_map" "view_glove_normal.png"
+//"metal_map" "view_glove_metal.png"
+//"roughness_map" "view_glove_roughness.png"
+}
+
+{
+"for" "#models/v_knife/view_skin.mdl"
+//"basecolor_map" "view_skin.png"
+//"normal_map" "view_skin_normal.png"
+//"metal_map" "view_skin_metal.png"
+//"roughness_map" "view_skin_roughness.png"
+}