Remove unneeded types (#949)

veggieseasons/lib/screens/details.dart

@@ -174,7 +174,7 @@ class InfoView extends StatelessWidget {
         children: [
           Row(
             mainAxisSize: MainAxisSize.max,
-            children: <Widget>[
+            children: [
               FutureBuilder<Set<VeggieCategory>>(
                 future: prefs.preferredCategories,
                 builder: (context, snapshot) {

veggieseasons/lib/screens/settings.dart

@@ -233,7 +233,7 @@ class SettingsScreen extends StatelessWidget {
             content: const Text(
               'Are you sure you want to reset the current settings?',
             ),
-            actions: <Widget>[
+            actions: [
               CupertinoDialogAction(
                 isDestructiveAction: true,
                 child: const Text('Yes'),
@@ -266,7 +266,7 @@ class SettingsScreen extends StatelessWidget {
               Styles.scaffoldBackground(CupertinoTheme.brightnessOf(context)),
           child: CustomScrollView(
             restorationId: 'list',
-            slivers: <Widget>[
+            slivers: [
               const CupertinoSliverNavigationBar(
                 largeTitle: Text('Settings'),
               ),
@@ -274,7 +274,7 @@ class SettingsScreen extends StatelessWidget {
                 top: false,
                 sliver: SliverList(
                   delegate: SliverChildListDelegate(
-                    <Widget>[
+                    [
                       SettingsGroup(
                         items: [
                           _buildCaloriesItem(context, prefs),

veggieseasons/lib/widgets/settings_item.dart

@@ -130,7 +130,7 @@ class SettingsItemState extends State<SettingsItem> {
                   child: widget.subtitle != null
                       ? Column(
                           crossAxisAlignment: CrossAxisAlignment.start,
-                          children: <Widget>[
+                          children: [
                             const SizedBox(height: 8.5),
                             Text(widget.label,
                                 style: themeData.textTheme.textStyle),

veggieseasons/lib/widgets/veggie_card.dart

@@ -122,7 +122,7 @@ class VeggieCard extends StatelessWidget {
         padding: const EdgeInsets.all(16),
         child: Column(
           crossAxisAlignment: CrossAxisAlignment.start,
-          children: <Widget>[
+          children: [
             Text(
               veggie.name,
               style: Styles.cardTitleText(themeData),