Remove unneeded dependencies from dependencies.json

[chrisklus]

These are still included, and should be removed:

  "phet-io-wrapper-classroom-activity": {
    "sha": "64aff78db6605aa5317724d50fdb28bd9cf495e2",
    "branch": "master"
  },
  "phet-io-wrapper-hookes-law-energy": {
    "sha": "85ce21c31f4a533993c84dfe2cd769d70fb65ef1",
    "branch": "master"
  },
  "phet-io-wrapper-lab-book": {
    "sha": "fb5c98c155259e2bdd37eb64e30081017a6e1d09",
    "branch": "master"
  },
  "phet-io-wrappers": {
    "sha": "77bb43e04e8b747d7cdff815fac5e091badeaf24",
    "branch": "master"
  },

[pixelzoom]

@chrisklus Maybe you mean that these dependencies are in the 1.1 release branch? I don't see these dependencies in master, and (as noted in #253) the next release is going to be on a new 1.2 release branch. So perhaps this issue can be closed?

[chrisklus]

I don't see these dependencies in master

Right, thanks. I must have been on 1.1. Closing.