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/NPC/PathfindingSystem.cs

@@ -289,7 +289,6 @@ namespace Content.Client.NPC
 
                 var invGridMatrix = gridXform.InvWorldMatrix;
                 DebugPathPoly? nearest = null;
-                var nearestDistance = float.MaxValue;
 
                 foreach (var poly in tile)
                 {