I'm assuming you're asking about Eph's Macro Saver
Go into C:\Program Files\Blockland\base\config\client\SavedMacros\ This is where they are saved. Delete them there...
If you speak of them in-game, and I hope you're not...
Press Ctrl+Z a few time to undo the last bunch of brick placements, or Hammer/Destructo Wand/Wand, (/wand in chat hud,) the bricks, or use either wand to destroy the base brick(s) of the macro to destroy the bricks the destroyed base brick, and above bricks.
