[TOOl-3590] Dashboard: Remove unused components and stories (#6406)

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## PR-Codex overview
This PR focuses on removing unused components and simplifying the `CouponCard` functionality by streamlining the handling of coupon applications and eliminating the modal for sharing free wallets.

### Detailed summary
- Deleted multiple files related to `share-free-wallets-modal` and analytics components.
- Removed the dynamic import of `LazyShareFreeWalletsModal` in `CouponCard.tsx`.
- Simplified the `onCouponApplied` function signature by removing the `isFreeWalletsCoupon` parameter.
- Eliminated state management for `showShareModal` in `CouponSection`.

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