adapt matlab GH action workflow

Author: Remi-Gau

.github/workflows/run_tests_matlab.yml

@@ -37,9 +37,6 @@ jobs:
           git clone https://github.com/MOxUnit/MOxUnit.git --depth 1
           git clone https://github.com/MOcov/MOcov.git --depth 1
 
-      - name: Copy Macs toolbox to SPM inputs_folder
-        run: cp -rv lib/MACS spm12/toolbox/MACS
-
       - name: Prepare data
         run: |
           inputs_folder='demos/MoAE/inputs/'