got rid of 'accept' dir in the tests

tests/accept/run/tack.nim

@@ -1,21 +0,0 @@
-discard """
-  file: "tack.nim"
-  output: "125"
-"""
-# the Ackermann function
-
-proc ack(x, y: int): int =
-  if x != 0:
-    if y != 0:
-      return ack(x-1, ack(x, y-1))
-    return ack(x-1, 1)
-  else:
-    return y + 1
-#  if x == 0: return y + 1
-#  elif y == 0: return ack(x-1, 1)
-#  else: return ack(x-1, ack(x, y-1))
-
-# echo(ack(0, 0))
-write(stdout, ack(3, 4)) #OUT 125
-
-