[TCSACR-661][Tizen.Uix.InputMethod] Remove deprecated RotationChanged event

[Inhong]

Description of Change

[Tizen.Uix.InputMethod] Remove deprecated RotationChanged event

API Changes

• ACR: https://jira.sec.samsung.net/browse/TCSACR-661

[gemini-code-assist]

Code Review

This pull request removes the deprecated rotation-related events, delegates, and classes from the Tizen.Uix.InputMethod namespace, including the RotationChanged event, RotationChangedEventArgs class, and their associated interop bindings. I have no feedback to provide as there are no review comments.

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[TizenAPI-Bot]

Public API Changed

Please follow the ACR process for the changed API below.

Added: 0, Removed: 3, Changed: 0

Removed

- /// <since_tizen>4</since_tizen
- [Obsolete]
- System.EventHandler`1<Tizen.Uix.InputMethod.RotationChangedEventArgs> Tizen.Uix.InputMethod.InputMethodEditor::RotationChanged

- /// <since_tizen>4</since_tizen
- [Obsolete]
- Tizen.Uix.InputMethod.RotationChangedEventArgs

- /// <since_tizen>4</since_tizen
- [Obsolete]
- System.Int32 Tizen.Uix.InputMethod.RotationChangedEventArgs::Degree()

[JoonghyunCho]

🤖 [AI Review]

Reviewed — no findings.

Scope checked:

• Verified all 3 removed symbols are deleted together as a consistent set: the RotationChanged event plus its backing field and ImeRotationChangedCb delegate field in InputMethodEditor.cs, the RotationChangedEventArgs class, and the ImeEventSetRotationChangedCb P/Invoke + ImeRotationChangedCb delegate in Interop.InputMethod.cs.
• Grepped the full repo (src/, test/, internals/, tools/) for remaining references to RotationChanged, RotationChangedEventArgs, ImeRotationChangedCb, and ime_event_set_rotation_degree_changed_cb — none remain outside the 3 touched files, so no dangling-reference build risk.
• Confirmed deprecation policy compliance: every removed member was marked Obsolete with 'Deprecated since API12. Will be removed in API14.', and this removal targets API14 with ACR TCSACR-661 linked.
• Deletion-only diff — neighboring DisplayLanguageChanged / AccessibilityStateChanged handlers and the rest of the public API surface are untouched.

No 🔴 critical issues, no 🟡 suggestions to flag.

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Automated review — final merge decision rests with human reviewers.