Remove duplicate sdist

Author: tobiasdiez

.github/workflows/release.yml

@@ -32,12 +32,6 @@ jobs:
           ./bootstrap
           ./configure
 
-      - name: make dist
-        run: |
-          make dist
-        env:
-          MAKE: make -j8
-
       - name: Download tarballs of all packages
         run: |
           build/bin/sage-package download :all: --no-file huge --allow-upstream