Remove Windows 2019 as it's not longer supported in github

.github/workflows/ci.yml

@@ -629,14 +629,6 @@ jobs:
       fail-fast: false
       matrix:
         include:
-          - toolset: msvc-14.0
-            cxxstd: "14"
-            addrmd: 32,64
-            os: windows-2019
-          - toolset: msvc-14.2
-            cxxstd: "14,17,20,latest"
-            addrmd: 32,64
-            os: windows-2019
           - toolset: msvc-14.3
             cxxstd: "14,17,20,latest"
             addrmd: 32,64
@@ -647,9 +639,8 @@ jobs:
             os: windows-2022
           - toolset: gcc
             cxxstd: "03,11,14,17,2a"
-            cxxflags: -pipe
             addrmd: 64
-            os: windows-2019
+            os: windows-2022
 
     timeout-minutes: 180
     runs-on: ${{matrix.os}}