Remove TLS/Reverse proxy and Dependencies sections from README

Both were low-value docs (TLS config is already in the Configuration
reference table; Go/JS dependencies are visible in go.mod and
web/package.json) that just added noise.

Co-authored-by: Copilot <223556219+Copilot@users.noreply.github.com>

README.md

@@ -230,33 +230,6 @@ make web-assets  # regenerate templ code + rebuild web/static/app.css and web/st
 
 ---
 
-## TLS / Reverse proxy
-
-### Self-signed certificate (development)
-
-```bash
-openssl req -x509 -newkey rsa:4096 -keyout key.pem -out cert.pem -days 365 -nodes
-```
-
-Update `config.yaml`:
-
-```yaml
-tls:
-  enabled: true
-  cert_file: cert.pem
-  key_file:  key.pem
-```
-
-### Caddy reverse proxy (recommended for production)
-
-```
-dav.example.com {
-    reverse_proxy localhost:8080
-}
-```
-
----
-
 ## Configuration reference
 
 ```yaml
@@ -370,24 +343,3 @@ reviewed and tested where practical, but not every part of the codebase
 has been fully reviewed yet — use accordingly, especially before relying
 on this in security-sensitive environments.
 
----
-
-## Dependencies
-
-| Package | Purpose |
-|---------|---------|
-| `github.com/emersion/go-webdav` | WebDAV/CalDAV/CardDAV protocol layer |
-| `github.com/emersion/go-ical`   | iCalendar parsing/serialisation |
-| `github.com/emersion/go-vcard`  | vCard parsing/serialisation |
-| `golang.org/x/crypto`           | bcrypt |
-| `golang.org/x/net`              | `golang.org/x/net/webdav` |
-| `gopkg.in/yaml.v3`              | YAML config parsing |
-| `modernc.org/sqlite`            | Pure-Go SQLite driver (shares, web UI sessions) |
-| `github.com/a-h/templ`          | Type-safe Go HTML templates (web UI) |
-
-Front-end (dev-only, not required at runtime — see [Web UI](#web-ui)):
-
-| Tool | Purpose |
-|------|---------|
-| Tailwind CSS v4 (`web/package.json`) | Utility-first CSS, compiled to `web/static/app.css` |
-| [htmx](https://htmx.org/) (`web/static/htmx.min.js`, vendored) | Partial page updates without a JS framework |