Android overhaul: remove dead code (tokens, an icon, catalogue and fake samples, helpers, unused imports)

Nothing referenced any of these:
* :core:design KvittDimens iconMeta, seesawWidth, KEYPAD_COLUMNS, presetMinHeight, navIndicatorWidth/Height;
  KvittShapes largeIncreased, extraLargeIncreased, extraExtraLarge (the FAB's 20 is `fab`); KvittSpacing
  navigationBarHeight (ShortNavigationBar draws its own 64 dp); KvittMotion's spatial/effects springs, hero count,
  bunting stagger, shared-axis, sheet-enter and keypad-swap values (only the seesaw spring is used); the
  segmentedItem builder and snackbarMillis (KvittSnackbarVisuals maps the duration itself); KvittIcon.Description
  with its two drawables.
* Catalogue sample Samples.renamedGroceries; fake scenarios SettleScenarios.partnerOwes and longAccountIds.
* :data Clock.todayDate().
* Unused imports in Common.kt, Settle.kt, Timeline.kt, AnalyticsScenarios.kt, Clock.kt.

Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_01TQd3pEP9UeN2uifbHknQ7B

android/data/src/main/kotlin/se/hagstedt/kvitt/data/util/Clock.kt

@@ -1,7 +1,6 @@
 package se.hagstedt.kvitt.data.util
 
 import java.time.Instant
-import java.time.LocalDate
 import java.time.ZoneId
 import java.time.ZoneOffset
 import java.time.format.DateTimeFormatter
@@ -34,5 +33,3 @@ fun Clock.nowTimestamp(): String = Timestamps.format(nowMillis())
 
 /** Today's date in the phone's zone, `YYYY-MM-DD`. */
 fun Clock.today(): String = Instant.ofEpochMilli(nowMillis()).atZone(zone()).toLocalDate().toString()
-
-fun Clock.todayDate(): LocalDate = LocalDate.parse(today())