Remove unused tslib

importHelpers is not enabled, so tsc inlines its helpers and nothing
imports tslib.

Author: microbit-matt-hillsdon

package-lock.json

@@ -71,8 +71,7 @@
     "react-dom": ">=18.0.0"
   },
   "dependencies": {
-    "base64-js": "^1.5.1",
-    "tslib": ">=2.0.0"
+    "base64-js": "^1.5.1"
   },
   "devDependencies": {
     "@chromatic-com/storybook": "^1.2.25",
@@ -94,7 +93,6 @@
     "react": "^19.0.0",
     "react-dom": "^19.0.0",
     "storybook": "^8.0.5",
-    "tslib": "^2.6.2",
     "typedoc": "^0.27.6",
     "typescript": "^5.2.2"
   }