remove redis

build_sdcard.sh

@@ -270,11 +270,6 @@ sudo apt-get install -y fbi
 # prepare for powertest
 sudo apt install -y sysbench
 
-# prepare dor display service
-# see https://github.com/rootzoll/raspiblitz/issues/88#issuecomment-471342311
-sudo apt-get install -y redis-server
-sudo -H pip3 install redis
-
 # check for dependencies on DietPi, Ubuntu, Armbian
 sudo apt-get install -y build-essential
 sudo apt-get install -y python-pip