Remove QCoro from Flatpak

QCoro is already available on the runtime.

.flatpak-manifest.json

@@ -149,27 +149,6 @@
             ],
             "builddir": true
         },
-        {
-            "name": "qcoro",
-            "buildsystem": "cmake-ninja",
-            "config-opts": [
-                "-DQCORO_BUILD_EXAMPLES=OFF",
-                "-DBUILD_TESTING=OFF"
-            ],
-            "sources": [
-                {
-                    "type": "archive",
-                    "url": "https://github.com/danvratil/qcoro/archive/refs/tags/v0.11.0.tar.gz",
-                    "sha256": "9942c5b4c533192f6c5954dc6d10178b3829075e6a621b67df73f0a4b74d8297",
-                    "x-checker-data": {
-                        "type": "anitya",
-                        "project-id": 236236,
-                        "stable-only": true,
-                        "url-template": "https://github.com/danvratil/qcoro/archive/refs/tags/v$version.tar.gz"
-                    }
-                }
-            ]
-        },
         {
             "name": "kunifiedpush",
             "buildsystem": "cmake-ninja",