Update README.md

Author: PiruthivirajM

README.md

@@ -5,48 +5,9 @@ This example demonstrates how to create a horizontal listview using Xamarin.Form
 ## Sample
 ```xaml
         <Grid>
-            <Grid.RowDefinitions>
-                <RowDefinition Height="Auto"/>
-                <RowDefinition Height="Auto"/>
-            </Grid.RowDefinitions>
-            <Grid x:Name="headerGrid" BackgroundColor="#FFEEEEF2" HeightRequest="45">
-                <Label LineBreakMode="NoWrap"
-             Text="Photo Gallery" FontAttributes="Bold"
-             FontSize="16" TextColor="Black" HorizontalOptions="Center" VerticalOptions="Center"/>
-            </Grid>
-            <syncfusion:SfListView x:Name="listView" Orientation="Horizontal" Padding="10,10,10,10"
-                                   SelectionMode="None" Grid.Row="1"
-                                   ItemsSource="{Binding Gallerynfo}"
-                                   ItemSpacing="3">
-                <syncfusion:SfListView.HeightRequest>
-                    <OnPlatform x:TypeArguments="x:Double">
-                        <On  Platform="Android">
-                            <OnIdiom x:TypeArguments="x:Double"  Phone="220" Tablet="220" />
-                        </On>
-                        <On  Platform="iOS">
-                            <OnIdiom x:TypeArguments="x:Double" Phone="170" Tablet="280" />
-                        </On>
-                        <On  Platform="UWP">
-                            <OnIdiom x:TypeArguments="x:Double"  Desktop="220" Phone="200" Tablet="220" />
-                        </On>
-                        <On  Platform="macOS" Value="220"/>
-                    </OnPlatform>
-                </syncfusion:SfListView.HeightRequest>
-
-                <syncfusion:SfListView.ItemSize>
-                    <OnPlatform x:TypeArguments="x:Double">
-                        <On  Platform="Android">
-                            <OnIdiom x:TypeArguments="x:Double"  Phone="173" Tablet="180" />
-                        </On>
-                        <On  Platform="iOS">
-                            <OnIdiom x:TypeArguments="x:Double" Phone="125" Tablet="250" />
-                        </On>
-                        <On  Platform="UWP">
-                            <OnIdiom x:TypeArguments="x:Double"  Desktop="170" Phone="160" Tablet="170" />
-                        </On>
-                        <On  Platform="macOS" Value="170"/>
-                    </OnPlatform>
-                </syncfusion:SfListView.ItemSize>
+            <syncfusion:SfListView x:Name="listView"
+                                   Orientation="Horizontal"
+                                   ItemsSource="{Binding Gallerynfo}">
 
                 <syncfusion:SfListView.ItemTemplate>
                     <DataTemplate>