localization: remove unused translations

Signed-off-by: leo <longshuang@msn.cn>

Author: love-linger

src/Resources/Locales/en_US.axaml

@@ -204,7 +204,6 @@
   <x:String x:Key="Text.CommitDetail.Info.SHA" xml:space="preserve">SHA</x:String>
   <x:String x:Key="Text.CommitDetail.Info.Signer" xml:space="preserve">Signer:</x:String>
   <x:String x:Key="Text.CommitDetail.Info.WebLinks" xml:space="preserve">Open in Browser</x:String>
-  <x:String x:Key="Text.CommitMessageTextBox.Column" xml:space="preserve">COL</x:String>
   <x:String x:Key="Text.CommitMessageTextBox.Placeholder" xml:space="preserve">Enter commit message. Please use an empty-line to separate subject and description!</x:String>
   <x:String x:Key="Text.CommitMessageTextBox.SubjectCount" xml:space="preserve">SUBJECT</x:String>
   <x:String x:Key="Text.Compare" xml:space="preserve">Compare</x:String>