chore: remove unified sdk references

[xdustinface]

Drop UNIFIED_SDK.md and references to it.

Summary by CodeRabbit

• Documentation
  • Removed Unified SDK integration documentation, build guidance, and related references from README and project documentation files.

[coderabbitai]

No actionable comments were generated in the recent review. 🎉

ℹ️ Recent review info

Configuration used: defaults

Review profile: CHILL

Plan: Pro

📥 Commits

Reviewing files that changed from the base of the PR and between 26e7bc4 and 2a27acb.

📒 Files selected for processing (5)

• README.md
• UNIFIED_SDK.md
• dash-spv-ffi/CLAUDE.md
• dash-spv-ffi/README.md
• key-wallet-ffi/README.md

💤 Files with no reviewable changes (5)

• dash-spv-ffi/CLAUDE.md
• key-wallet-ffi/README.md
• UNIFIED_SDK.md
• README.md
• dash-spv-ffi/README.md

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📝 Walkthrough

Walkthrough

Removes all references and documentation related to the Unified SDK integration from the project. This includes deleting the dedicated UNIFIED_SDK.md documentation file and removing Unified SDK build instructions, recommendations, and notes from various README files across multiple directories.

Changes

Cohort / File(s)	Summary
Unified SDK Documentation Removal README.md, UNIFIED_SDK.md	Deleted dedicated UNIFIED_SDK.md file (90 lines) and removed 2 references to Unified SDK from the main README, including removal from the "Supports" list and "Component Documentation" section.
FFI Package Documentation Updates dash-spv-ffi/CLAUDE.md, dash-spv-ffi/README.md, key-wallet-ffi/README.md	Removed Unified SDK build guidance sections, recommendations for iOS integration via Unified SDK, and associated bash workflow instructions from multiple package documentation files (17, 13, and 13 lines respectively).

Estimated code review effort

🎯 2 (Simple) | ⏱️ ~10 minutes

Poem

🐰 Out with the SDK, so unified and grand,
Documentation cleaned with a wave of the hand,
Build scripts and notes take their final bow,
The project moves forward, streamlined and how! ✨

🚥 Pre-merge checks | ✅ 3

✅ Passed checks (3 passed)

Check name	Status	Explanation
Description Check	✅ Passed	Check skipped - CodeRabbit’s high-level summary is enabled.
Title check	✅ Passed	The title 'chore: remove unified sdk references' accurately and concisely summarizes the main change: removing Unified SDK documentation and references across multiple files in the repository.
Docstring Coverage	✅ Passed	No functions found in the changed files to evaluate docstring coverage. Skipping docstring coverage check.

_{✏️ Tip: You can configure your own custom pre-merge checks in the settings.}

✨ Finishing Touches

🧪 Generate unit tests (beta)

• Create PR with unit tests
• Post copyable unit tests in a comment
• Commit unit tests in branch chore/remove-unified-sdk

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The base branch was changed.

[ZocoLini]

what about removing the build-ios.sh script??

[xdustinface]

Yeah makes sense, will drop it in #296 or a separate PR.