removed windows 2019 and ubuntu 20.04 files and reference

.github/ISSUE_TEMPLATE/announcement.yml

@@ -44,7 +44,6 @@ body:
         - label: macOS 15
         - label: macOS 15 Arm64
         - label: macOS 26 Arm64
-        - label: Windows Server 2019
         - label: Windows Server 2022
         - label: Windows Server 2025
   - type: textarea

.github/ISSUE_TEMPLATE/bug-report.yml

@@ -27,7 +27,6 @@ body:
         - label: macOS 15
         - label: macOS 15 Arm64
         - label: macOS 26 Arm64
-        - label: Windows Server 2019
         - label: Windows Server 2022
         - label: Windows Server 2025
   - type: textarea

.github/ISSUE_TEMPLATE/tool-request.yml

@@ -65,7 +65,6 @@ body:
         - label: macOS 15
         - label: macOS 15 Arm64
         - label: macOS 26 Arm64
-        - label: Windows Server 2019
         - label: Windows Server 2022
         - label: Windows Server 2025
   - type: textarea

.github/workflows/windows2019.yml

@@ -1,20 +0,0 @@
-name: Trigger Windows19 CI
-run-name: Windows2019 - ${{ github.event.pull_request.title }}
-
-on:
-  pull_request_target:
-    types: labeled
-    paths:
-    - 'images/windows/**'
-
-defaults:
-  run:
-    shell: pwsh
-
-jobs:
-  Windows_2019:
-    if: github.event.label.name == 'CI windows-all' || github.event.label.name == 'CI windows-2019'
-    uses: ./.github/workflows/trigger-ubuntu-win-build.yml
-    with:
-      image_type: 'windows2019'
-    secrets: inherit