Revert "CL-1753 | Add instant rollback feature support for Launch CLI"

[AryanBansal-launch]

Reverts #158

[github-actions]

🔒 Security Scan Results

ℹ️ Note: Only vulnerabilities with available fixes (upgrades or patches) are counted toward thresholds.

Check Type	Count (with fixes)	Without fixes	Threshold	Result
🔴 Critical Severity	0	0	10	✅ Passed
🟠 High Severity	0	0	25	✅ Passed
🟡 Medium Severity	4	0	500	✅ Passed
🔵 Low Severity	0	0	1000	✅ Passed

⏱️ SLA Breach Summary

✅ No SLA breaches detected. All vulnerabilities are within acceptable time thresholds.

Severity	Breaches (with fixes)	Breaches (no fixes)	SLA Threshold (with/no fixes)	Status
🔴 Critical	0	0	15 / 30 days	✅ Passed
🟠 High	0	0	30 / 120 days	✅ Passed
🟡 Medium	0	0	90 / 365 days	✅ Passed
🔵 Low	0	0	180 / 365 days	✅ Passed

✅ BUILD PASSED - All security checks passed

[Copilot]

Pull request overview

This PR reverts the previously introduced “instant rollback” feature (#158) by removing the rollback command implementation, associated tests, and the related GraphQL fields/mutations that were added to support it.

Changes:

• Removed the launch rollback command implementation and its unit tests.
• Removed the rollback GraphQL mutation and trimmed rollback-related fields/conditionals from environment/deployment queries.
• Cleaned up .talismanrc to stop ignoring the deleted rollback test files.

Reviewed changes

Copilot reviewed 6 out of 6 changed files in this pull request and generated no comments.

Show a summary per file

File	Description
test/unit/commands/rollback.test.ts	Deletes Mocha-based unit tests for the rollback command.
src/graphql/queries.ts	Removes rollback-specific fields/variable usage from deployment/environment queries.
src/graphql/mutation.ts	Removes the rollbackDeployment mutation export and its GraphQL definition.
src/commands/launch/rollback.ts	Deletes the rollback command implementation.
src/commands/launch/rollback.test.ts	Deletes Jest-based tests for the rollback command.
.talismanrc	Removes ignore entries for rollback test files that no longer exist.

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