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

valve/pbr/models/osprey_bodygibs.mdl/osprey_bodygibs.mat

@@ -0,0 +1,24 @@
+
+{
+"for" "#models/osprey_bodygibs/cockpit_dead.mdl"
+//"basecolor_map" "cockpit_dead.png"
+//"normal_map" "cockpit_dead_normal.png"
+//"metal_map" "cockpit_dead_metal.png"
+//"roughness_map" "cockpit_dead_roughness.png"
+}
+
+{
+"for" "#models/osprey_bodygibs/dead_interior.mdl"
+//"basecolor_map" "dead_interior.png"
+//"normal_map" "dead_interior_normal.png"
+//"metal_map" "dead_interior_metal.png"
+//"roughness_map" "dead_interior_roughness.png"
+}
+
+{
+"for" "#models/osprey_bodygibs/fuselage_side_dead.mdl"
+//"basecolor_map" "fuselage_side_dead.png"
+//"normal_map" "fuselage_side_dead_normal.png"
+//"metal_map" "fuselage_side_dead_metal.png"
+//"roughness_map" "fuselage_side_dead_roughness.png"
+}