[!!!][TASK] Remove methods from AbstractSectionMarkupGeneratedEvent

Since the fluid based page module is the only
available variant since v11, two PageLayoutView
related methods were deprecated in favour of
their fluid based page module counterparts.

Therefore, the deprecated methods are now removed.

Resolves: #96211
Related: #95261
Releases: main
Change-Id: Ie33249e521e0973b1ba113d4fdd057e115ab0b89
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