fix: Error signing output with public key from file

Author: doghappy

src/SocketIOClient.Windows7/SocketIOClient.Windows7.csproj

@@ -16,7 +16,6 @@
 
   <ItemGroup>
     <None Remove="lib\System.Net.WebSockets.Client.Managed.dll" />
-    <None Remove="SocketIOClient.Windows7.snk" />
   </ItemGroup>
 
   <ItemGroup>

src/SocketIOClient.Windows7/SocketIOClient.Windows7.snk

@@ -25,10 +25,6 @@
     <OutputPath>bin\Release\</OutputPath>
   </PropertyGroup>
 
-  <ItemGroup>
-    <None Remove="SocketIOClient.snk" />
-  </ItemGroup>
-
   <ItemGroup>
     <PackageReference Include="System.Collections" Version="4.3.0" />
     <PackageReference Include="System.Text.Json" Version="5.0.2" />