Remove mdbook-alerts as mdBook now supports this feature natively

Author: ad-si

book.toml

@@ -5,7 +5,6 @@ authors = ["Adrian Sieber"]
 language = "en"
 src = "docs-source"
 
-[preprocessor.alerts]
 [preprocessor.toc]
 command = "mdbook-toc"
 renderer = ["html"]

docs-source/cli/import.md

@@ -195,11 +195,8 @@ Seen at [discussions.apple.com/thread/8570915](
     osascript export-reminders.scpt
     ```
 1. Enter the name of the list you want to export
-    <!--
-      TODO: Use alert after
-            https://github.com/lambdalisue/rs-mdbook-alerts/issues/17
-    -->
-    > **⚠️ Warning** \
+
+    > [!WARNING]
     > It includes *all reminders* - even completed ones - in the list.
     > If it's a long list, it will take a while.
     > A better approach would be to create a new list and move all

flake.nix

@@ -36,7 +36,6 @@
             haskellPackages.hlint
             haskellPackages.stack
             mdbook
-            mdbook-alerts
             mdbook-toc
             nodejs_22  # For building the webapp
             sqlite