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

cstrike/pbr/models/pi_tree1.mdl/pi_tree1.mat

@@ -0,0 +1,40 @@
+
+{
+"for" "#models/pi_tree1/g_branch01.mdl"
+//"basecolor_map" "g_branch01.png"
+//"normal_map" "g_branch01_normal.png"
+//"metal_map" "g_branch01_metal.png"
+//"roughness_map" "g_branch01_roughness.png"
+}
+
+{
+"for" "#models/pi_tree1/g_branch02.mdl"
+//"basecolor_map" "g_branch02.png"
+//"normal_map" "g_branch02_normal.png"
+//"metal_map" "g_branch02_metal.png"
+//"roughness_map" "g_branch02_roughness.png"
+}
+
+{
+"for" "#models/pi_tree1/g_branch03.mdl"
+//"basecolor_map" "g_branch03.png"
+//"normal_map" "g_branch03_normal.png"
+//"metal_map" "g_branch03_metal.png"
+//"roughness_map" "g_branch03_roughness.png"
+}
+
+{
+"for" "#models/pi_tree1/g_branch05.mdl"
+//"basecolor_map" "g_branch05.png"
+//"normal_map" "g_branch05_normal.png"
+//"metal_map" "g_branch05_metal.png"
+//"roughness_map" "g_branch05_roughness.png"
+}
+
+{
+"for" "#models/pi_tree1/trunk35.mdl"
+//"basecolor_map" "trunk35.png"
+//"normal_map" "trunk35_normal.png"
+//"metal_map" "trunk35_metal.png"
+//"roughness_map" "trunk35_roughness.png"
+}