Remove Internet Explorer 11 specific logic from KTextTruncator

[MisRob]

🌱 Are you new to the codebase? Welcome and please see the contributing guidelines.

Description

Remove logic specific to Internet Explorer 11 from KTextTruncator, including:

• The lineHeightIE prop
• The IE11 fallback from the truncate method
• Other related cleanup if identified

Impact

Starting with Kolibri 0.17, we're dropping IE11 support. Therefore, KDS no longer needs to account for IE11-specific cases. This update removes unnecessary code, making future maintenance easier.

Trade-offs

None identified.

Guidance

Target the develop branch, as this will be released as a breaking change.

Acceptance criteria

• The updated KTextTruncator is tested, for example in Kolibri, and has no regressions

[Nivas7]

Can you please Assign me on this issue?

[MisRob]

Hi @Nivas7, yes, thanks for volunteering!

[MisRob]

Closed by #652