Remove unused temporary key.

CMake generate its own key.

Author: nmoinvaz

test/uwp/Package.appxmanifest

@@ -4,7 +4,7 @@
   xmlns:uap="http://schemas.microsoft.com/appx/manifest/uap/windows10"
   xmlns:desktop4="http://schemas.microsoft.com/appx/manifest/desktop/windows10/4"
   IgnorableNamespaces="uap mp">
-  <Identity Name="proxycli" Publisher="CN=CMake" Version="1.0.0.0" />
+  <Identity Name="proxycli" Publisher="CN=CMake Test Cert" Version="1.0.0.0" />
   <mp:PhoneIdentity PhoneProductId="44aa77dd-e529-4e34-afee-b47dc9485484"
     PhonePublisherId="00000000-0000-0000-0000-000000000000" />
   <Properties>