chore(nextcloud): Remove outdated installation instructions

Signed-off-by: jld3103 <[email protected]>

packages/nextcloud/README.md

@@ -2,26 +2,6 @@
 
 A Nextcloud API client written in Dart.
 
-## Installation
-
-In the future this code will be available at https://pub.dev/packages/nextcloud, but for now you have to include it via git in your pubspec.yaml:
-```yaml
-dependencies:
-  nextcloud:
-    git:
-      url: https://github.com/nextcloud/neon
-      path: packages/nextcloud
-      ref: $COMMIT
-
-dependency_overrides:
-  dynamite_runtime:
-    git:
-      url: https://github.com/nextcloud/neon
-      path: packages/dynamite/dynamite_runtime
-      ref: $COMMIT
-```
-You can either remove the `ref` or use a commit hash. It's not recommended to remove it, because then the version will be updated very often.
-
 ## Usage
 
 ### Authentication