CI: remove procdump setup

It was added in 6ff1a1f8a6, but we never really needed
it since then.

Since MS is currently down and this causes CI to fail, it's a good time
to remove it.

If we need it again it's always in the git history..

.github/workflows/main.yml

@@ -33,19 +33,6 @@ jobs:
           $BUILD_DRIVE = Split-Path $env:GITHUB_WORKSPACE -Qualifier
           echo "drive=$BUILD_DRIVE" >> $env:GITHUB_OUTPUT
 
-      - name: Setup JIT minidump
-        run: |
-          Set-Location '${{ runner.temp }}'
-          Invoke-WebRequest -Uri 'https://download.sysinternals.com/files/Procdump.zip' -OutFile Procdump.zip
-          Expand-Archive Procdump.zip -DestinationPath .
-          New-Item -Path '_dumps' -ItemType Directory
-          if ($env:RUNNER_ARCH -eq 'ARM64') {
-            .\procdump64a.exe -accepteula -ma -i "${{ runner.temp }}/_dumps"
-          } else {
-            .\procdump64.exe -accepteula -ma -i "${{ runner.temp }}/_dumps"
-            .\procdump.exe -accepteula -ma -i "${{ runner.temp }}/_dumps"
-          }
-
       - name: Configure Pagefile
         if: ${{ matrix.msystem != 'CLANGARM64' }}
         # https://github.com/al-cheb/configure-pagefile-action/issues/16
@@ -103,14 +90,6 @@ jobs:
           path: ${{ steps.facts.outputs.drive }}/_/artifacts/*.pkg.tar.*
           if-no-files-found: ignore
 
-      - name: "Upload dumps"
-        if: ${{ !cancelled() }}
-        uses: actions/upload-artifact@v5
-        with:
-          name: ${{ matrix.msystem }}-dumps
-          path: ${{ runner.temp }}/_dumps/*.dmp
-          if-no-files-found: ignore
-
   check:
     needs: [build]
     runs-on: windows-2022