Deleted helio workstation (#11638)

Co-authored-by: Akinwale Alagbe <akalagbe@microsoft.com>

manifests/h/Helio/HelioWorkstation/3.4/Helio.HelioWorkstation.yaml

@@ -1,21 +0,0 @@
-PackageIdentifier: Helio.HelioWorkstation
-PackageVersion: 3.4
-PackageName: Helio Workstation
-Publisher: Helio
-License: GNU General Public License 3.0
-LicenseUrl: https://github.com/helio-fm/helio-workstation/blob/develop/LICENSE
-Moniker: helio
-Tags:
-- music composition
-- gplv3
-- helio-fm
-ShortDescription: One music sequencer for all major platforms, desktop and mobile.
-PackageUrl: https://helio.fm/
-Installers:
-- Architecture: neutral
-  InstallerUrl: https://ci.helio.fm/helio-3.4.exe
-  InstallerSha256: D7A4CAF8F96655941288354640C0ACA4C52B21E5EB85B912B8466BF08A5CCE37
-  InstallerType: inno
-PackageLocale: en-US
-ManifestType: singleton
-ManifestVersion: 1.0.0