fix: Fix unnecessary permissions

This came up during review for v3.0.0 in the Chrome Web Store.  This
also bumps the version to v3.0.1.

Change-Id: I4d61bb6ea9f677f51b516acc913cf6841a7a7bc9

manifest.json

@@ -1,7 +1,7 @@
 {
   "name": "EME Call and Event Logger",
   "short_name": "EME Logger",
-  "version": "3.0.0",
+  "version": "3.0.1",
   "manifest_version": 2,
   "description": "Logs all Encrypted Media Extensions (EME) method calls and events.",
   "content_scripts": [{
@@ -28,7 +28,6 @@
     "default_title": "EME Logger",
     "default_popup": "popup.html"
   },
-  "permissions": ["unlimitedStorage"],
   "web_accessible_resources": [
     "trace-anything.js",
     "eme-trace-config.js"