Dockerfile - remove useless lines

Dockerfile

@@ -13,23 +13,9 @@ RUN apt-get update
 RUN apt-get install --force-yes -y emdebian-archive-keyring
 RUN apt-get update
 
-RUN apt-get install --force-yes -y gcc-4.7-arm-linux-gnueabihf ncurses-dev uboot-mkimage build-essential git vim libusb-1.0-0-dev pkg-config 
+RUN apt-get install --force-yes -y gcc-4.7-arm-linux-gnueabihf ncurses-dev uboot-mkimage build-essential git vim libusb-1.0-0-dev pkg-config bc 
 
 RUN ln -s /usr/bin/arm-linux-gnueabihf-gcc-4.7 /usr/bin/arm-linux-gnueabihf-gcc
-#RUN mkdir -p /olinux
-#VOLUME /home/emile/dev/github/olinuxino-a20-lime2/olinux /olinux
-#RUN mkdir -p /olinux/sunxi
-
-#RUN git clone -b sunxi https://github.com/linux-sunxi/u-boot-sunxi.git /olinux/sunxi/u-boot-sunxi
-#RUN cd /olinux/sunxi/u-boot-sunxi && make CROSS_COMPILE=arm-linux-gnueabihf A20-OLinuXino-Lime_config && make CROSS_COMPILE=arm-linux-gnueabihf-
-#
-#RUN git clone https://github.com/linux-sunxi/linux-sunxi -b stage/sunxi-3.4 /olinux/sunxi/linux-sunxi
-#RUN cp /olinux/a20_defconfig /olinux/sunxi/linux-sunxi/arch/arm/configs/.
-#RUN cd /olinux/sunxi/linux-sunxi/ && make ARCH=arm a20_defconfig
-#RUN cd /olinux/sunxi/linux-sunxi/ && patch -p0 < ../../sunxi-i2c.patch
-#RUN cd /olinux/sunxi/linux-sunxi/ && make ARCH=arm CROSS_COMPILE=arm-linux-gnueabihf- uImage  
-#RUN cd /olinux/sunxi/linux-sunxi/ && make ARCH=arm CROSS_COMPILE=arm-linux-gnueabihf- INSTALL_MOD_PATH=out modules
-#RUN cd /olinux/sunxi/linux-sunxi/ && make ARCH=arm CROSS_COMPILE=arm-linux-gnueabihf- INSTALL_MOD_PATH=out modules_install
 
 # install packages for debootstrap
 RUN apt-get install --force-yes -y debootstrap dpkg-dev qemu binfmt-support qemu-user-static dpkg-cross