Remove Ollama server infrastructure and related tasks

ansible/inventory/group_vars/desktop.yml

@@ -8,7 +8,6 @@ desktop_default_session: i3
 desktop_default_session_env: xorg
 desktop_restart_emptty_automatically: false
 desktop_emptty_session_error_logging: disabled
-desktop_ollama_enabled: false
 
 desktop_common_packages:
   - brightnessctl
@@ -146,12 +145,7 @@ desktop_source_tools:
     install_name: rust-script
     build_output_path: target/release/rust-script
 
-desktop_binary_tools:
-  - name: ollama
-    install_name: ollama
-    repo: https://github.com/ollama/ollama
-    asset_arch: amd64
-    install_mode: tree
+desktop_binary_tools: []
 
 desktop_npm_packages:
   - name: "opencode-ai"