build: remove unused dependencies (#33333)

Removes some dependencies don't appear to be used anywhere.

Author: crisbeto

package.json

@@ -129,7 +129,6 @@
     "postcss-scss": "^4.0.4",
     "prettier": "^3.5.3",
     "protractor": "^7.0.0",
-    "requirejs": "^2.3.6",
     "rollup": "^4.52.3",
     "rollup-plugin-dts": "6.4.1",
     "rollup-plugin-sourcemaps2": "0.5.7",
@@ -140,14 +139,11 @@
     "slugify": "^1.6.6",
     "source-map-support": "^0.5.21",
     "stylelint": "^14.14.0",
-    "terser": "^5.10.0",
     "ts-node": "^10.9.1",
     "tsec": "0.2.9",
-    "tsickle": "0.46.3",
     "tslint": "^6.1.3",
     "tsutils": "^3.21.0",
     "vrsource-tslint-rules": "6.0.0",
-    "yaml": "^2.8.1",
     "yargs": "^18.0.0",
     "zx": "^8.0.0"
   }