Remove now outdated information from readme (#5548)

README.md

@@ -119,11 +119,6 @@ Based off RHH's pokeemerald-expansion 1.9.3 https://github.com/rh-hideout/pokeem
     - ***Gen 6+ Exp. Share*** (configurable)
     - Berserk Gene
     - Most battle items from Gen 4+
-    - Existing item data but missing effects:
-        - Gimmighoul Coin
-        - Booster Energy
-        - Tera Shards
-        - Tera Orb
 - ***Feature branches incorporated (with permission):***
     - [RHH intro credits](https://github.com/Xhyzi/pokeemerald/tree/rhh-intro-credits) by @Xhyzi.
         - A small signature from all of us to show the collective effort in the project :)