Last step does not need sleep

Author: MakisH

tools/tests/dockerfiles/ubuntu_2404/Dockerfile

@@ -246,7 +246,7 @@ RUN git clone --depth 1 https://gitlab.dune-project.org/extensions/dune-subgrid.
 RUN git clone --depth 1 https://git.iws.uni-stuttgart.de/dumux-repositories/dumux.git -b releases/${DUMUX_VERSION} && sleep 10
 RUN git clone -b cell_problems https://git.iws.uni-stuttgart.de/dumux-appl/dumux-phasefield.git && sleep 10
 RUN git clone --depth 1 https://gitlab.dune-project.org/extensions/dune-SPGrid.git -b releases/${DUNE_VERSION} && sleep 10
-RUN git clone --depth 1 https://gitlab.dune-project.org/core/dune-localfunctions.git -b releases/${DUNE_VERSION} && sleep 10
+RUN git clone --depth 1 https://gitlab.dune-project.org/core/dune-localfunctions.git -b releases/${DUNE_VERSION}
 # build core DUNE, DuMuX and the adapter
 ARG DUMUX_ADAPTER_PR
 ARG DUMUX_ADAPTER_REF