Remove obsolete manifest.webapp

lib/app.rb

@@ -74,7 +74,7 @@ class App < Sinatra::Application
     use Rack::Deflater
     use Rack::Static,
       root: 'public',
-      urls: %w(/assets /docs/ /images /favicon.ico /robots.txt /opensearch.xml /manifest.webapp /mathml.css),
+      urls: %w(/assets /docs/ /images /favicon.ico /robots.txt /opensearch.xml /mathml.css),
       header_rules: [
         [:all,           {'Cache-Control' => 'no-cache, max-age=0'}],
         ['/assets',      {'Cache-Control' => 'public, max-age=604800'}],

public/manifest.webapp

@@ -1,22 +0,0 @@
-{
-  "name": "DevDocs",
-  "description": "All-in-one API Documentation Browser",
-  "version": "1.0.0",
-
-  "developer": {
-    "name": "Thibaut Courouble",
-    "url": "http://devdocs.io"
-  },
-
-  "default_locale": "en",
-  "installs_allowed_from": ["*"],
-  "chrome": { "navigation": true },
-
-  "icons": {
-    "32": "/images/webapp-icon-32.png",
-    "60": "/images/webapp-icon-60.png",
-    "80": "/images/webapp-icon-80.png",
-    "128": "/images/webapp-icon-128.png",
-    "256": "/images/webapp-icon-256.png"
-  }
-}