Remove unnecessary configurations from CMakeSettings.json.sample

These extra configurations are not really used by anyone and cause issues
for new comers as it defaults to launching msys2 build, which immediately
fails

CMakeSettings.json.sample

@@ -7,67 +7,9 @@
     {
       "environment": "vcpkg",
       "VcPkgDir": "D:/vcpkg/"
-    },
-    {
-      "environment": "mingw_64",
-      "MINGW64_ROOT": "D:/msys64/mingw64",
-      "BIN_ROOT": "${env.MINGW64_ROOT}/bin",
-      "FLAVOR": "x86_64-w64-mingw32",
-      "TOOLSET_VERSION": "10.2.0",
-      "PATH": "${env.MINGW64_ROOT}/bin;${env.MINGW64_ROOT}/../usr/local/bin;${env.MINGW64_ROOT}/../usr/bin;${env.MINGW64_ROOT}/../bin;${env.PATH}",
-      "INCLUDE": "${env.INCLUDE};${env.MINGW64_ROOT}/include/c++/${env.TOOLSET_VERSION};${env.MINGW64_ROOT}/include/c++/${env.TOOLSET_VERSION}/tr1;${env.MINGW64_ROOT}/include/c++/${env.TOOLSET_VERSION}/${env.FLAVOR}"
     }
   ],
   "configurations": [
-    {
-      "name": "x86-Debug",
-      "generator": "Ninja",
-      "configurationType": "Debug",
-      "inheritEnvironments": [ "msvc_x86", "vcpkg" ],
-      "buildRoot": "${env.BuildDir}\\${name}",
-      "installRoot": "${env.InstallDir}\\${name}",
-      "addressSanitizerEnabled": false,
-      "cmakeCommandArgs": "",
-      "buildCommandArgs": "-v",
-      "ctestCommandArgs": "",
-      "variables": [
-        {
-          "name": "KICAD_BUILD_QA_TESTS",
-          "value": "False",
-          "type": "BOOL"
-        },
-        {
-          "name": "KICAD_WIN32_DPI_AWARE",
-          "value": "ON",
-          "type": "BOOL"
-        }
-      ],
-      "cmakeToolchain": "${env.VcPkgDir}/scripts/buildsystems/vcpkg.cmake"
-    },
-    {
-      "name": "x86-Release",
-      "generator": "Ninja",
-      "configurationType": "RelWithDebInfo",
-      "inheritEnvironments": [ "msvc_x86", "vcpkg" ],
-      "buildRoot": "${env.BuildDir}\\${name}",
-      "installRoot": "${env.InstallDir}\\${name}",
-      "cmakeCommandArgs": "",
-      "buildCommandArgs": "-v",
-      "ctestCommandArgs": "",
-      "variables": [
-        {
-          "name": "KICAD_BUILD_QA_TESTS",
-          "value": "False",
-          "type": "BOOL"
-        },
-        {
-          "name": "KICAD_WIN32_DPI_AWARE",
-          "value": "ON",
-          "type": "BOOL"
-        }
-      ],
-      "cmakeToolchain": "${env.VcPkgDir}/scripts/buildsystems/vcpkg.cmake"
-    },
     {
       "name": "x64-Debug",
       "generator": "Ninja",
@@ -115,38 +57,7 @@
         }
       ],
       "cmakeToolchain": "${env.VcPkgDir}/scripts/buildsystems/vcpkg.cmake"
-    },
-    {
-      "name": "MSYS2-x64-Debug",
-      "generator": "Ninja",
-      "configurationType": "Debug",
-      "inheritEnvironments": [ "mingw_64" ],
-      "buildRoot": "${env.BuildDir}\\${name}",
-      "installRoot": "${env.InstallDir}\\${name}",
-      "cmakeCommandArgs": "",
-      "buildCommandArgs": "-v",
-      "ctestCommandArgs": "",
-      "intelliSenseMode": "linux-gcc-x64",
-      "cmakeToolchain": "",
-      "variables": [
-        {
-          "name": "CMAKE_C_COMPILER",
-          "value": "${env.BIN_ROOT}/gcc.exe"
-        },
-        {
-          "name": "CMAKE_CXX_COMPILER",
-          "value": "${env.BIN_ROOT}/g++.exe"
-        },
-        {
-          "name": "KICAD_BUILD_QA_TESTS",
-          "value": "False",
-          "type": "BOOL"
-        },
-        {
-          "name": "KICAD_WIN32_DPI_AWARE",
-          "value": "ON",
-          "type": "BOOL"
-        }
+    }
       ]
     }
   ]