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.Shared/Shuttles/Systems/SharedShuttleSystem.cs

@@ -146,7 +146,6 @@ public abstract partial class SharedShuttleSystem : EntitySystem
 
         // Just checks if any grids inside of a buffer range at the target position.
         _grids.Clear();
-        var ftlRange = FTLRange;
         var mapCoordinates = coordinates.ToMap(EntityManager, XformSystem);
 
         var ourPos = Maps.GetGridPosition((shuttleUid, shuttlePhysics, shuttleXform));