Reduced Warning Count By 130 For Full Rebuilds (#26518)

* remove deprecated entity coordinate extension functions. Reduces warning count by approximately 50

* final toCoords Removed

* Remove all unused variables and dead code paths

* remove always true variable, should be a cvar or something instead

* remove superfluous variables from tests

Content.Client/Items/Systems/ItemSystem.cs

@@ -93,7 +93,7 @@ public sealed class ItemSystem : SharedItemSystem
         else if (TryComp(uid, out SpriteComponent? sprite))
             rsi = sprite.BaseRSI;
 
-        if (rsi == null || rsi.Path == null)
+        if (rsi == null)
             return false;
 
         var state = (item.HeldPrefix == null)