[flatpak] remove manifest

org.gtk.teleportapp.json

-{
-  "app-id": "org.gtk.teleportapp",
-  "runtime": "org.gnome.Platform",
-  "runtime-version": "master",
-  "sdk": "org.gnome.Sdk",
-  "command": "teleportapp",
-  "tags": ["devel"],
-  "desktop-file-name-prefix": "(Development) ",
-  "finish-args": [
-    "--share=network",
-    "--share=ipc",
-    "--socket=x11",
-    "--socket=wayland",
-    "--socket=system-bus",
-    "--filesystem=xdg-run/dconf",
-    "--filesystem=~/.config/dconf:ro",
-    "--talk-name=ca.desrt.dconf",
-    "--env=DCONF_USER_CONFIG_DIR=.config/dconf"
-  ],
-  "build-options" : {
-    "cflags": "-O2 -g",
-    "cxxflags": "-O2 -g",
-    "env": {
-      "V": "1"
-    }
-  },
-  "cleanup": ["/include", "/lib/pkgconfig",
-    "/share/pkgconfig", "/share/aclocal",
-    "/man", "/share/man", "/share/gtk-doc",
-    "/share/vala",
-    "*.la", "*.a"],
-    "modules": [
-      {
-        "name": "avahi",
-        "cleanup": [ "/bin" ],
-        "config-opts": [
-          "--with-distro=none",
-          "--enable-gobject",
-          "--with-xml=expat",
-          "--disable-libdaemon",
-          "--disable-core-docs",
-          "--disable-manpages",
-          "--disable-mono",
-          "--disable-qt3",
-          "--disable-qt4",
-          "--disable-python",
-          "--disable-gtk",
-          "--disable-gtk3"
-        ],
-        "sources": [
-          {
-            "type": "archive",
-            "url": "http://avahi.org/download/avahi-0.7.tar.gz",
-            "sha256": "57a99b5dfe7fdae794e3d1ee7a62973a368e91e414bd0dfa5d84434de5b14804"
-          }
-        ]
-      },
-      {
-        "name": "teleportapp",
-        "sources": [
-          {
-            "type": "git",
-            "branch": "flatpak",
-            "url": "https://github.com/frac-tion/teleport.git"
-          }
-        ]
-      }
-    ]
-}