refactor: Update starship.toml file path and remove unused symbol

setup.sh

@@ -59,7 +59,6 @@ configure_starship() {
 overwrite_starship_toml() {
     if [ -f "./terminal/starship.toml" ]; then
         echo "Overwriting starship.toml..."
-        mkdir -p ~/.config/starship
         cp ./terminal/starship.toml ~/.config/starship.toml
         
         # Check if icon parameter is provided