remove bintray variables and csbt from the release workflow

Author: ivantopo

.github/workflows/release.yml

@@ -12,12 +12,10 @@ jobs:
       - run: git fetch --depth=1 origin '+refs/tags/*:refs/tags/*'
       - uses: olafurpg/setup-scala@v10
       - name: Release
-        run: csbt ";+instrumentation/publishLocal; release"
+        run: sbt ";+instrumentation/publishLocal; release"
         shell: bash
         env:
           PGP_SECRET: ${{ secrets.PGP_SECRET }}
           PGP_PASSPHRASE: ${{ secrets.PGP_PASSPHRASE }}
-          BINTRAY_USER: ${{ secrets.BINTRAY_USER }}
-          BINTRAY_PASS: ${{ secrets.BINTRAY_PASS }}
           SONATYPE_PASSWORD: ${{ secrets.SONATYPE_PASSWORD }}
           SONATYPE_USERNAME: ${{ secrets.SONATYPE_USERNAME }}