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Remove stale flag: new_checkout_flow

Automatically generated by FlagShark — flag has been at 100% for 90+ days

src/features/checkout.ts-6 lines
-if (featureFlags.isEnabled("new_checkout_flow")) {
- // TODO: remove after launch
- processCheckout(cart);
-}
+processCheckout(cart);
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src/features/checkout.ts
// Line 847
if (featureFlags.isEnabled("new_checkout_flow")) {
  // TODO: remove after launch
  // Added: March 2021
  processCheckout(cart);
}

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