Remove code signing and update installer icon

.github/workflows/release.yml

@@ -87,24 +87,6 @@ jobs:
       - name: Compile and package installer
         run: |
           cargo wix --nocapture --package volta --output target\wix\volta-windows.msi
-      - name: Load Certificate File
-        id: certificate_file
-        if: github.event_name == 'push'
-        uses: timheuer/base64-to-file@v1
-        with:
-          fileName: "volta-certificate.pfx"
-          encodedString: ${{ secrets.INSTALLER_CERTIFICATE }}
-      - name: Sign Installer
-        if: github.event_name == 'push'
-        env:
-          CERTIFICATE_FILE: ${{ steps.certificate_file.outputs.filePath }}
-          CERTIFICATE_PASSWORD: ${{ secrets.INSTALLER_CERTIFICATE_PASSWORD }}
-        run: |
-          & "C:\Program Files (x86)\Windows Kits\10\bin\10.0.19041.0\x86\signtool.exe" sign /fd sha256 /f "$env:CERTIFICATE_FILE" /p "$env:CERTIFICATE_PASSWORD" /tr http://ts.ssl.com /td sha256 /d "Volta: Start Your Engines" /du "https://volta.sh" "target\wix\volta-windows.msi"
-      - name: Verify Signature
-        if: github.event_name == 'push'
-        run: |
-          & "C:\Program Files (x86)\Windows Kits\10\bin\10.0.19041.0\x86\signtool.exe" verify /pa "target\wix\volta-windows.msi"
       - name: Create zip of binaries
         run: powershell Compress-Archive volta*.exe volta-windows.zip
         working-directory: ./target/release