chore: remove the unused myEP API settings from the theme

The app config JSON carried "myEpApiBaseUrl" from the TypoScript setting
myEpApiEndpointUrl, which only the alvac and cllt sys_template records set:
the other sites rendered the unresolved "{$plugin.tx_eptheme.settings...}"
into the page. No JavaScript reads the key (only paCode and externalDomains
are used), and the MyE&P API client takes its URL, credentials and timeout
from the ep_products extension configuration, so the theme's
myEpApiEndpointUrl, myEpApiToken and myEpApiTimeout settings had no reader.

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

packages/ep_theme/Resources/Private/Partials/Config.html

@@ -2,7 +2,6 @@
     {
         "loaderUrl": "<f:format.raw>{f:uri.image(src: 'EXT:ep_theme/Resources/Public/images/ajax-loader-white.gif', absolute: 1)}</f:format.raw>",
         "iconSpriteUrl": "<f:format.raw>{f:uri.image(src: 'EXT:ep_theme/Resources/Public/images/icons_sprite.svg', absolute: 1)}</f:format.raw>",
-        "myEpApiBaseUrl": "<f:format.raw>{settings.myEpApiEndpointUrl}</f:format.raw>",
         "paCode": <f:if condition='{context.paCode}'><f:then>"{context.paCode}"</f:then><f:else>null</f:else></f:if>,
         "externalDomains": <f:format.raw>{settings.domainsToTrack -> v:iterator.explode() -> f:format.json() -> f:format.raw()}</f:format.raw>
     }