refactor: remove unused struct members and methods

Co-authored-by: aider (openai/andrew/openrouter/qwen/qwen3-coder) <aider@aider.chat>

src/config.rs

@@ -37,7 +37,6 @@ pub struct Settings {
     pub list_format: Vec<ColumnConfig>,
     pub human_readable: bool,
     pub output_format: Option<String>,
-    pub verbose: u8,
     pub quiet: bool,
     pub force: bool,
     pub server: Option<ServerConfig>,
@@ -46,12 +45,6 @@ pub struct Settings {
     pub digest: Option<String>,
 }
 
-impl Settings {
-    pub fn verbose(&self) -> u8 {
-        self.verbose
-    }
-}
-
 impl Settings {
     /// Create unified settings from config and args with proper priority
     pub fn new(args: &Args, default_dir: PathBuf) -> Result<Self> {