Remove useless function

Author: nnyyxxxx

tabs/applications-setup/zsh-setup.sh

@@ -49,7 +49,6 @@ EOL
 revertZSH() {
     echo "Reverting ZSH setup..."
     CONFIG_DIR="$HOME/.config/zsh"
-    ZSHRC_FILE="$CONFIG_DIR/.zshrc"
 
     if [ -d "${CONFIG_DIR}" ]; then
         rm -rf "$CONFIG_DIR"