fix generation of updater channel files in CI

Author: Alberto Iannaccone

Diff for: .github/workflows/build.yml

@@ -60,9 +60,7 @@ jobs:
           if [ $IS_FORK = true ]; then
             echo "Skipping the app signing: building from a fork."
           else
-            export BUILD_SUFFIX="linux";
             if [ "${{ runner.OS }}" = "macOS" ]; then
-              export BUILD_SUFFIX="mac";
               export CSC_LINK="${{ runner.temp }}/signing_certificate.p12"
               # APPLE_SIGNING_CERTIFICATE_P12 secret was produced by following the procedure from:
               # https://www.kencochrane.com/2020/08/01/build-and-sign-golang-binaries-for-macos-with-github-actions/#exporting-the-developer-certificate
@@ -71,7 +69,6 @@ jobs:
               export CSC_KEY_PASSWORD="${{ secrets.KEYCHAIN_PASSWORD }}"
 
             elif [ "${{ runner.OS }}" = "Windows" ]; then
-              export BUILD_SUFFIX="";
               export CSC_LINK="${{ runner.temp }}/signing_certificate.pfx"
               npm config set msvs_version 2017 --global
               echo "${{ secrets.WINDOWS_SIGNING_CERTIFICATE_PFX }}" | base64 --decode > "$CSC_LINK"
@@ -81,15 +78,7 @@ jobs:
           fi
 
           yarn --cwd ./electron/packager/
-          yarn --cwd ./electron/packager/ package 
-
-          export BUILD_PREFIX="stable"
-          if [ "$IS_NIGHTLY" = true ]; then
-            export BUILD_PREFIX="nightly"
-          fi
-
-          mv electron/build/dist/latest-$BUILD_SUFFIX.yml electron/build/dist/$BUILD_PREFIX-$BUILD_SUFFIX.yml
-          rm electron/build/dist/alpha* electron/build/dist/beta*
+          yarn --cwd ./electron/packager/ package
 
       - name: Upload [GitHub Actions]
         uses: actions/upload-artifact@v2

Diff for: electron/packager/config.js

@@ -106,7 +106,7 @@ function getChannel() {
     return 'nightly';
   }
 
-  return 'none';
+  return '';
 }
 
 function timestamp() {