removed concurrency

Author: Petr Sramek

.github/workflows/dotnet.yml

@@ -62,9 +62,6 @@ jobs:
         os: [ubuntu-latest, windows-latest, macos-latest]
         netversion: [7, 8, 9]
 
-    concurrency:
-      group: benchmark
-
     runs-on: ${{ matrix.os }}
 
     steps: