Normally I would say yes, get rid of Enchanting but...ouch, enchanting costs by far the most to level or takes the longest to level, and getting rid of it would cause me severe pain.

But yeah, the good news is you can keep mining since the +50stam/500hp is a great tank buff, and just drop enchanting for JC.

JC is also one of the fastest and cheapest professions to level (the mats cost a lot around the 265-300 range but other than that they're really cheap and easy to get).

So its up to you whether you should drop enchanting or not - the bottom line is right now JC provides AWESOME benefits for anyone (tank or not), but after you get epic trinkets, and after new epic gems come out the benefits might not be as stark. But of course JC right now can also make you ~200g a day in about 60 seconds doing the daily