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

cstrike/pbr/models/pi_stlamp.mdl/pi_stlamp.mat

@@ -0,0 +1,24 @@
+
+{
+"for" "#models/pi_stlamp/lamp_beam.mdl"
+//"basecolor_map" "lamp_beam.png"
+//"normal_map" "lamp_beam_normal.png"
+//"metal_map" "lamp_beam_metal.png"
+//"roughness_map" "lamp_beam_roughness.png"
+}
+
+{
+"for" "#models/pi_stlamp/lamp_metal.mdl"
+//"basecolor_map" "lamp_metal.png"
+//"normal_map" "lamp_metal_normal.png"
+//"metal_map" "lamp_metal_metal.png"
+//"roughness_map" "lamp_metal_roughness.png"
+}
+
+{
+"for" "#models/pi_stlamp/lamp_unlit.mdl"
+//"basecolor_map" "lamp_unlit.png"
+//"normal_map" "lamp_unlit_normal.png"
+//"metal_map" "lamp_unlit_metal.png"
+//"roughness_map" "lamp_unlit_roughness.png"
+}