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.IntegrationTests/PoolManager.cs

@@ -306,11 +306,6 @@ public static partial class PoolManager
                 Pairs[fallback!] = true;
             }
 
-            if (fallback == null && _pairId > 8)
-            {
-                var x = 2;
-            }
-
             return fallback;
         }
     }