Delete `CollectCobblestoneTask` and replace with catalogue item

[TacoTechnica]

It looks like this is referenced from CollectCobblestoneTask, but in reality both tasks should be replaced with

mine("cobblestone", MiningRequirement.WOOD, new Block[]{Blocks.COBBLESTONE, Blocks.STONE}, Items.COBBLESTONE);
mine("cobbled_deepslate", MiningRequirement.WOOD, new Block[]{Blocks.COBBLED_DEEPSLATE, Blocks.DEEPSLATE}, Items.COBBLED_DEEPSLATE);

Originally posted in https://github.com/gaucho-matrero/altoclef/pull/110#r729427998