Removed unneccesary files

dockerfiles/extra_libs/humble_plugins.txt

-# Read the plugin list and copy the plugins to their destinations
-# RUN if [ -f "${ROS_DISTRO}_plugins.txt" ]; \
-#    then \
-#        while IFS= read -r line; \
-#        do \
-#            echo "Processing line: $line"; \
-#            if [[ "$line" == \#* ]]; \
-#            then \
-#                echo "Skipping ${line}"; \
-#            else \
-#                plugin_name=$(echo "$line" | awk '{print $1}'); \
-#                destination=$(echo "$line" | awk '{print $2}'); \
-#                echo "Coping ${plugin_name} into ${destination}"; \
-#                mkdir -p "$destination" && cp -r "$plugin_name" "$destination/"; \
-#            fi; \
-#        done < ${ROS_DISTRO}_plugins.txt ; \
-#    fi
-#
-# list of files and destination folders
-librealsense_gazebo_plugin.so /usr/lib/x86_64-linux-gnu/gazebo-11/plugins

dockerfiles/extra_libs/sources.txt

-https://github.com/sharkdp/bat/releases/
-https://github.com/lsd-rs/lsd/releases
-https://github.com/BurntSushi/ripgrep/releases