Remove references to fabric in docs (#3766)

Author: gustovafing

docs/content/Development/External-Resources.md

@@ -16,9 +16,6 @@ as other resources you might find helpful.
     - [Forge-Wiki](https://docs.minecraftforge.net/en/1.20.x/)  
     - [NeoForge-Wiki](https://docs.neoforged.net/)
 
-!!! link "Official Fabric Docs"
-    [Fabric-Wiki :material-arrow-right: Mod Developer Docs](https://fabricmc.net/wiki/tutorial:start)
-
 !!! link "Other Modding Docs"
     - [Forge Community-Wiki](https://forge.gemwire.uk/wiki/Main_Page)
     - [MCJty's Modding Wiki](https://www.mcjty.eu/docs/intro)

docs/content/Development/General-Topics/Capabilities.md

@@ -161,7 +161,6 @@ public static void init() {
         WaypointManager.init();
         AddonFinder.getAddons().forEach(IGTAddon::initializeAddon);
 
-        // fabric exclusive, squeeze this in here to register before stuff is used
         GTRegistration.REGISTRATE.registerRegistrate();
 
         GregTechDatagen.initPost();