Remove unused KeyBinding

Author: Garulf

Flow.Launcher/MainWindow.xaml

@@ -46,10 +46,6 @@
             Key="Tab"
             Command="{Binding SelectPrevItemCommand}"
             Modifiers="Shift" />
-        <KeyBinding
-            Key="C"
-            Command="{Binding CopyToClipboard}"
-            Modifiers="Ctrl" />       
         <KeyBinding
             Key="I"
             Command="{Binding OpenSettingCommand}"