Remove unused partials and add some way to automatically detect it (#…

…38004)

* Add docs-check-unused-templates in npm commands and workflow

* Remove unused partials icons templates

package.json

@@ -74,8 +74,9 @@
     "js-test-cloud": "cross-env BROWSERSTACK=true npm run js-test-karma",
     "js-test-jquery": "cross-env JQUERY=true npm run js-test-karma",
     "lint": "npm-run-all --aggregate-output --continue-on-error --parallel js-lint css-lint lockfile-lint",
-    "docs": "npm-run-all docs-build docs-lint",
+    "docs": "npm-run-all docs-build docs-lint docs-check-unused-templates",
     "docs-build": "hugo --cleanDestinationDir",
+    "docs-check-unused-templates": "hugo --printUnusedTemplates",
     "docs-compile": "npm run docs-build",
     "docs-vnu": "node build/vnu-jar.js",
     "docs-lint": "npm run docs-vnu",