Remove gcc on windows, already tested on linux.

.github/workflows/ci.yml

@@ -155,14 +155,6 @@ jobs:
             cxxstd: "14,17,latest"
             addrmd: 32,64
             os: windows-2022
-          - toolset: gcc
-            cxxstd: "03,11,14,17,2a"
-            addrmd: 64
-            os: windows-2019
-          - toolset: gcc
-            cxxstd: "03,11,14,17,2a"
-            addrmd: 64
-            os: windows-2022
 
     runs-on: ${{matrix.os}}