refactor(headlines-feed): remove clear all filters functionality

- Remove ClearSourceFiltersRequested event from sources_filter_event.dart
- Remove _onClearSourceFiltersRequested handler from sources_filter_bloc.dart
- Remove reset filters button from source_filter_page.dart

Author: fulleni

lib/headlines-feed/bloc/sources_filter_bloc.dart

@@ -26,7 +26,6 @@ class SourcesFilterBloc extends Bloc<SourcesFilterEvent, SourcesFilterState> {
     on<AllSourceTypesCapsuleToggled>(_onAllSourceTypesCapsuleToggled);
     on<SourceTypeCapsuleToggled>(_onSourceTypeCapsuleToggled);
     on<SourceCheckboxToggled>(_onSourceCheckboxToggled);
-    on<ClearSourceFiltersRequested>(_onClearSourceFiltersRequested);
     on<SourcesFilterApplyFollowedRequested>(
       _onSourcesFilterApplyFollowedRequested,
     );
@@ -177,22 +176,6 @@ class SourcesFilterBloc extends Bloc<SourcesFilterEvent, SourcesFilterState> {
     emit(state.copyWith(finallySelectedSourceIds: currentSelected));
   }
 
-  Future<void> _onClearSourceFiltersRequested(
-    ClearSourceFiltersRequested event,
-    Emitter<SourcesFilterState> emit,
-  ) async {
-    emit(
-      state.copyWith(
-        selectedCountryIsoCodes: {},
-        selectedSourceTypes: {},
-        finallySelectedSourceIds: {},
-        displayableSources: List.from(state.allAvailableSources),
-        dataLoadingStatus: SourceFilterDataLoadingStatus.success,
-        clearErrorMessage: true,
-      ),
-    );
-  }
-
   /// Handles the request to apply the user's followed sources as filters.
   Future<void> _onSourcesFilterApplyFollowedRequested(
     SourcesFilterApplyFollowedRequested event,

lib/headlines-feed/bloc/sources_filter_event.dart

@@ -62,10 +62,6 @@ class SourceCheckboxToggled extends SourcesFilterEvent {
   List<Object> get props => [sourceId, isSelected];
 }
 
-class ClearSourceFiltersRequested extends SourcesFilterEvent {
-  const ClearSourceFiltersRequested();
-}
-
 /// {@template sources_filter_apply_followed_requested}
 /// Event triggered to request applying the user's followed sources as filters.
 /// {@endtemplate}

lib/headlines-feed/view/source_filter_page.dart

@@ -98,15 +98,7 @@ class _SourceFilterView extends StatelessWidget {
               );
             },
           ),
-          IconButton(
-            icon: const Icon(Icons.clear_all_outlined),
-            tooltip: l10n.headlinesFeedFilterResetButton,
-            onPressed: () {
-              context.read<SourcesFilterBloc>().add(
-                const ClearSourceFiltersRequested(),
-              );
-            },
-          ),
+
           IconButton(
             icon: const Icon(Icons.check),
             tooltip: l10n.headlinesFeedFilterApplyButton,