Fix running tests

.. -mcache-lookup-bc is gone and forgotten

Author: jepler

.github/workflows/build.yml

@@ -72,10 +72,10 @@ jobs:
       run: MICROPY_CPYTHON3=python3.8 MICROPY_MICROPYTHON=../ports/unix/micropython-coverage ./run-tests.py -j1 --emit native
       working-directory: tests
     - name: mpy Tests
-      run: MICROPY_CPYTHON3=python3.8 MICROPY_MICROPYTHON=../ports/unix/micropython-coverage ./run-tests.py -j1 --mpy-cross-flags='-mcache-lookup-bc' --via-mpy -d basics float micropython
+      run: MICROPY_CPYTHON3=python3.8 MICROPY_MICROPYTHON=../ports/unix/micropython-coverage ./run-tests.py -j1 --via-mpy -d basics float micropython
       working-directory: tests
     - name: Native mpy Tests
-      run: MICROPY_CPYTHON3=python3.8 MICROPY_MICROPYTHON=../ports/unix/micropython-coverage ./run-tests.py -j1 --mpy-cross-flags='-mcache-lookup-bc' --via-mpy --emit native -d basics float micropython
+      run: MICROPY_CPYTHON3=python3.8 MICROPY_MICROPYTHON=../ports/unix/micropython-coverage ./run-tests.py -j1 --via-mpy --emit native -d basics float micropython
       working-directory: tests
     - name: Build native modules
       run: |