use --target-host for remote deploys

utilities/nixos-installers/install_notes.md

@@ -234,21 +234,6 @@ efi   /EFI/Microsoft/Boot/bootmgfw.efi
 
 # Nix Infrastructure & Automation Improvements
 
-- [ ] **Replace deployment scripts with [`deploy-rs`](https://github.com/serokell/deploy-rs)** for declarative, hands-off host updates.  
-    Remove manual `deploy_linode`/`deploy_oracle` scripts. Use `deploy-rs` to apply updates across one or all hosts, including remote builds.
-- [ ] **Add `isoImage` outputs for every host for instant USB/boot media creation.**  
-    Use:  
-
-    ```
-    packages.x86_64-linux.install-iso = nixosConfigurations.<host>.config.system.build.isoImage;
-    ```
-
-    Then:  
-
-    ```
-    nix build .#packages.x86_64-linux.install-iso
-    ```
-
 - [ ] **Document or automate new host bootstrap:**  
   - Script or steps: boot custom ISO, git clone config, secrets onboarding (agenix), nixos-install with flake config.
   - Provide an example shell script or README note for a single-command initial setup.
@@ -258,7 +243,6 @@ efi   /EFI/Microsoft/Boot/bootmgfw.efi
 - [ ] **Remote build reliability:**  
   - Parametrize/automate remote builder enable/disable.
   - Add quickstart SSH builder key setup instructions per-host in README.
-  - (Optional) Use deploy-rs's agent forwarding and improve errors if builder can't be reached at deploy time.
 - [ ] **Add [disko](https://github.com/nix-community/disko) to declaratively manage disk/partition creation for new installs and reinstalls.**
 
 - work on secrets pre ragenix, stormd pre install for all the above bootstrapping steps would be ideal