refactor: remove code outside the first-goal scope

Keeps what the product detail pages, the AJAX date/price tables, the
API endpoints (/api/hotel, /api/product, /api/content/*), the chatbot
content-only page type and the MyE&P import need, determined by a class
and template reference closure from those entry points.

Removed: search, watchlist, calendar/contingent AJAX, snow report and
contingent imports, groups swiss, iCal, reseller export, team/EpTeam,
newsletter, CSV feeds, BpnConnect client, backend modules and page
module previews, Tcemain hooks, scheduler tasks, staging and static
search middlewares, forms and their finishers, gridelements and news
templates, and the plugins and content elements not used on product
pages.

The SFTP and local XML import sources are gone; the import reads
MyE&P only (ApiImportSource as ProductImportSource) and runs as
ep:import-dates.

ext_tables.sql stays complete so no table or column is dropped while
the TYPO3 10 project shares the data.

Co-Authored-By: Claude Opus 5.5 <[email protected]>

packages/ep_theme/Configuration/TypoScript/ContentElements/lineup.typoscript

@@ -1,24 +0,0 @@
-tt_content.lineup =< lib.contentElement
-tt_content.lineup {
-    templateName = Lineup
-    dataProcessing {
-        10 = TYPO3\CMS\Frontend\DataProcessing\DatabaseQueryProcessor
-        10 {
-            table = tx_eptheme_domain_model_lineup
-            where.data = field:uid
-            where.wrap = tt_content=|
-            orderBy = sorting
-            as = items
-
-            dataProcessing {
-                10 = TYPO3\CMS\Frontend\DataProcessing\FilesProcessor
-                10 {
-                    references.fieldName = image
-                    references.table = tx_eptheme_domain_model_lineup
-                    as = image
-                }
-            }
-        }
-    }
-}
-