remove trailing line

Author: mauri870

unix/linux/Dockerfile

@@ -15,7 +15,6 @@ RUN apt-get update && apt-get install -y  --no-install-recommends \
 # Get the git sources. If not cached, this takes O(5 minutes).
 WORKDIR /git
 RUN git config --global advice.detachedHead false
-
 # Linux Kernel: Released 12 May 2024
 RUN git clone --branch v6.9 --depth 1 https://kernel.googlesource.com/pub/scm/linux/kernel/git/torvalds/linux
 # GNU C library: Released 31 Jan 2024