Remove calendar week view feature flag from public flags (#22950)

## Summary
- Remove `IS_CALENDAR_WEEK_VIEW_ENABLED` from the public feature flag
registry
- Keep the remaining public feature flags unchanged

## Note
Needs more polish before being released in the Lab

packages/twenty-server/src/engine/core-modules/feature-flag/constants/public-feature-flag.const.ts

@@ -12,14 +12,6 @@ export type PublicFeatureFlag = {
 };
 
 export const PUBLIC_FEATURE_FLAGS: PublicFeatureFlag[] = [
-  {
-    key: FeatureFlagKey.IS_CALENDAR_WEEK_VIEW_ENABLED,
-    metadata: {
-      label: 'Calendar Day and Week Views',
-      description:
-        'Display calendar records in daily or weekly layouts with optional end dates',
-    },
-  },
   {
     key: FeatureFlagKey.IS_JUNCTION_RELATIONS_ENABLED,
     metadata: {