remove old documentation

Author: maximevanhees

docs/installation.md

@@ -194,55 +194,4 @@ EOF
 sudo zinit init
 ```
 
-If all is working correctly, you should see Zinit start and run your service.
-
-## Upgrading Zinit
-
-To upgrade an existing Zinit installation:
-
-1. Stop any running Zinit instances (if not running as init)
-2. Download or build the new version
-3. Replace the existing binary:
-
-```bash
-sudo cp new-zinit /usr/local/bin/zinit
-```
-
-4. Restart Zinit or reboot the system
-
-## Troubleshooting Installation
-
-### Common Issues
-
-#### Permission Denied
-
-If you get "permission denied" errors:
-
-```bash
-sudo chmod +x /usr/local/bin/zinit
-```
-
-#### Missing Libraries
-
-If you encounter missing library errors when running the binary, ensure you built with musl for a statically linked binary:
-
-```bash
-# Rebuild with musl
-make
-```
-
-#### Socket Connection Issues
-
-If you can't connect to the Zinit socket:
-
-```bash
-# Verify the socket exists
-ls -la /var/run/zinit.sock
-
-# Check permissions
-sudo chmod 755 /var/run/zinit.sock
-```
-
-## Next Steps
-
-Once installed, refer to the [Quickstart Guide](quickstart.md) to begin using Zinit.
+If all is working correctly, you should see Zinit start and run your service.