remove not needed flag

.github/workflows/main.yml

@@ -76,7 +76,7 @@ jobs:
           make
       - name: run tests
         run: |
-          cd build && ./ut ${FILTER_TESTS}
+          cd build && ./ut
       - name: Build Rust bindings
         run: |
           cd src/rustapi/pqc-sys && cargo build