Remove deps that are no longer used

Author: isaacs

package.json

@@ -13,20 +13,13 @@
   "dependencies": {
     "buffer-equal": "~0.0.0",
     "deep-equal": "^1.0.0",
-    "difflet": "~0.2.0",
-    "events-to-array": "^1.0.1",
     "exit-code": "^1.0.1",
     "glob": "^4.4.1",
-    "inherits": "*",
     "js-yaml": "^3.3.1",
     "mkdirp": "^0.5.0",
-    "nopt": "^3.0.1",
-    "runforcover": "~0.0.2",
-    "slide": "*",
     "supports-color": "^1.3.1",
     "tap-mocha-reporter": "0.0 || 1",
-    "tap-parser": "^1.0.1",
-    "yamlish": "*"
+    "tap-parser": "^1.0.1"
   },
   "keywords": [
     "assert",