Update incomplete license information and credits

mods/ENTITIES/mcl_minecarts/README.txt

@@ -3,12 +3,6 @@ mcl_minecarts
 Based on the mod "boost_carts" by Krock.
 Target: Run smoothly and do not use too much CPU.
 
-TODO:
-- Minecraft-like physics
-- Add activator rail
-- Add more rail textures
-- Add loaded minecarts
-
 License of source code:
 -----------------------
 MIT License
@@ -23,10 +17,5 @@ Authors/licenses of media files:
 Minecart model:
   22i (GPLv3)
 
-Wuzzy (based on Pixel Perfection 1.11, MIT License):
-  carts_rail_crossing_pwr.png
-  carts_rail_curved_pwr.png
-  carts_rail_t_junction_pwr.png
-
-Other texture files (CC BY-SA 3.0:
+Texture files (CC BY-SA 3.0):
   XSSheep