sand.flan keeps the experiment out of the tree

Two half-typed lines went in with an unrelated keybinding commit and left
the tree not checking.  They are the arena-at-top-level experiment and they
belong in a working tree, not in history.

sand.flan

@@ -180,9 +180,6 @@
                              (rl/get-color c))))))
   (rl/draw-fps 20 20))
 
-(defvar frame Allocator (arena-new 262144))
-(defvar game-data (embed (with-allocator frame )))
-
 (defn main [] ()
   (rl/set-trace-log-level :warning)
   (rl/init-window screen-width screen-height "SAND")