Remove changes to imsc package in Dash.js

Author: ryanmccartney

package-lock.json

@@ -67,13 +67,11 @@
         "fast-deep-equal": "2.0.1",
         "foodoc": "^0.0.9",
         "html-entities": "^1.2.1",
+        "imsc": "^1.1.4",
         "localforage": "^1.7.1",
         "path-browserify": "^1.0.1",
         "ua-parser-js": "^1.0.2"
     },
-    "peerDependencies": {
-        "imsc": "^1.1.4"
-    },
     "repository": {
         "type": "git",
         "url": "https://github.com/Dash-Industry-Forum/dash.js.git"