chore: remove fastly purging logic (#2173)

package.json

@@ -52,7 +52,6 @@
     "del": "^6.0.0",
     "eslint": "^7.23.0",
     "fancy-log": "^1.3.3",
-    "fastly-purge": "^1.0.1",
     "git-branch": "^2.0.1",
     "gulp": "^4.0.2",
     "gulp-awspublish": "^4.1.2",
@@ -88,8 +87,7 @@
     "stylelint-config-sass-guidelines": "^8.0.0",
     "stylelint-order": "^4.1.0",
     "stylelint-scss": "^3.19.0",
-    "stylelint-selector-bem-pattern": "^2.1.0",
-    "through2": "^4.0.2"
+    "stylelint-selector-bem-pattern": "^2.1.0"
   },
   "dependencies": {
     "core-js": "^3.10.1",