Revert "Added ffmpeg"

This reverts commit 2f2b551ea8.

package-lock.json

@@ -898,11 +898,6 @@
         "when": ">= 0.0.1"
       }
     },
-    "ffmpeg-static": {
-      "version": "2.7.0",
-      "resolved": "https://registry.npmjs.org/ffmpeg-static/-/ffmpeg-static-2.7.0.tgz",
-      "integrity": "sha512-Khjg/4tCBen58ixhXlkRNqs3hUKpTOlGOUrw859M09tdjeMkXyXRQ+YuJjGczRhGO7Y8fHPJZcQ37V/OzvZvjQ=="
-    },
     "firebase": {
       "version": "6.6.2",
       "resolved": "https://registry.npmjs.org/firebase/-/firebase-6.6.2.tgz",