fix: remove unused dependencies

gulpfile.js

@@ -1,9 +1,5 @@
 const { src, dest, parallel } = require('gulp');
 const include = require('gulp-include');
-const sass = require('gulp-sass');
-const cleanCSS = require('gulp-clean-css');
-
-sass.compiler = require('node-sass');
 
 function html() {
   return src('static/*')

install.sh

@@ -1 +1 @@
-npm install gulp gulp-include gulp-sass gulp-clean-css node-sass
+npm install gulp gulp-include