Feature: Deleted not needed mkdir (#974)

The COPY command create the folder /opt/bin/ if not exists.
So there is no need to create the folder. Deleting the line reduce the
docker image by one layer and save disk space.
Tested with docker and podman.

Author: kaifried

Base/Dockerfile

@@ -51,11 +51,6 @@ RUN useradd seluser \
   && echo 'seluser:secret' | chpasswd
 ENV HOME=/home/seluser
 
-#=======================================
-# Create shared / common bin directory
-#=======================================
-RUN  mkdir -p /opt/bin 
-
 #======================================
 # Add Grid check script
 #======================================