Revert "Merge branch 'feature/193-statisticsview-rework' into development"

This reverts commit 24f49e17b9, reversing
changes made to dba6c218d6.

# Conflicts:
#	pubspec.yaml

lib/data/dao/statistic_group_dao.dart

@@ -1,67 +0,0 @@
-import 'package:drift/drift.dart';
-import 'package:tallee/data/db/database.dart';
-import 'package:tallee/data/db/tables/group_table.dart';
-import 'package:tallee/data/db/tables/statistic_group_table.dart';
-import 'package:tallee/data/models/group.dart';
-
-part 'statistic_group_dao.g.dart';
-
-@DriftAccessor(tables: [StatisticGroupTable, GroupTable])
-class StatisticGroupDao extends DatabaseAccessor<AppDatabase>
-    with _$StatisticGroupDaoMixin {
-  StatisticGroupDao(super.db);
-
-  /// Retrieves a list of groups associated with a specific statistic.
-  Future<List<Group>?> getGroupsForStatistic(String statisticId) async {
-    final query = select(statisticGroupTable).join([
-      innerJoin(
-        groupTable,
-        groupTable.id.equalsExp(statisticGroupTable.groupId),
-      ),
-    ])..where(statisticGroupTable.statisticId.equals(statisticId));
-
-    final results = await query.map((row) => row.readTable(groupTable)).get();
-    if (results.isEmpty) return null;
-    final groups = await Future.wait(
-      results.map((result) async {
-        final groupMembers = await db.playerGroupDao.getPlayersOfGroup(
-          groupId: result.id,
-        );
-        return Group(
-          id: result.id,
-          createdAt: result.createdAt,
-          name: result.name,
-          description: result.description,
-          members: groupMembers,
-        );
-      }),
-    );
-
-    return groups;
-  }
-
-  Future<bool> addStatisticGroups({
-    required String statisticId,
-    required List<Group> groups,
-  }) async {
-    final entries = groups
-        .map(
-          (group) => StatisticGroupTableCompanion.insert(
-            statisticId: statisticId,
-            groupId: group.id,
-          ),
-        )
-        .toList();
-
-    return batch((batch) {
-      batch.insertAll(
-        statisticGroupTable,
-        entries,
-        mode: InsertMode.insertOrReplace,
-      );
-    }).then((_) => true).catchError((error) {
-      print('Error adding statistic groups: $error');
-      return false;
-    });
-  }
-}