Revert "Revert "Drop NuGet restore""

This reverts commit 2dc5fce8654ffeb6f3e570b0bdefcc6a5b6a6d2b.

azure-pipelines.yml

@@ -9,9 +9,6 @@ steps:
     msbuild /t:Restore Terminal.sln
   displayName: Restore dependencies
 
-- script: |
-    nuget restore
-  displayName: Nuget restore
 
 - script: |
     if echo $BUILD_SOURCEBRANCH | grep /release/; then perl -pi -e "s/PackageVersion>.*</PackageVersion>${BUILD_SOURCEBRANCHNAME}</" Terminal.Gui/Terminal.Gui.csproj; fi