Remove ubuntu build

Consequently, artifacts get uploaded on windows.

.github/workflows/CI-CD.yml

@@ -20,10 +20,7 @@ jobs:
 
   build-and-test:
     name: "Build and Test"
-    strategy:
-      matrix:
-        os: [windows-latest]
-    runs-on: ${{ matrix.os }}
+    runs-on: windows-latest
 
     steps:
     - name: Checkout
@@ -39,13 +36,8 @@ jobs:
     - name: Build and Pack
       run: dotnet build --configuration Release
 
-    - name: Test (Ubuntu)
-      run: dotnet test --configuration Release --no-build --filter TestCategory!=RequiresDisplay -- NUnit.TestOutputXml=TestResults
-      if: matrix.os == 'ubuntu-latest'
-
     - name: Test (Windows)
       run: dotnet test --configuration Release --no-build -- NUnit.TestOutputXml=TestResults
-      if: matrix.os != 'ubuntu-latest'
 
     - name: Upload Test Results
       if: always()
@@ -61,7 +53,6 @@ jobs:
         path: |
           output/*.nupkg
           output/*.snupkg
-      if: matrix.os == 'ubuntu-latest'
 
   publish-nuget:
     name: "Publish NuGet package"