MAINT: remove unused and inappropriate function

make_db

@@ -103,25 +103,6 @@ function _setup_mytap() {
     echo [DONE]
 }
 
-function setup_os() {
-  # - mariadb-client :: For SQL server configuration.
-  PACKAGES="git
-  make
-  mariadb-client
-  maven
-  openjdk-8-jdk-headless
-  python3-pip
-  screen
-  unzip
-"
-  # - vim :: For debugging
-  PACKAGES+="vim
-"
-  apt-get update
-  apt-get dist-upgrade -y
-  apt-get install -y $PACKAGES
-}
-
 function install_db() {
     if _db_exists ; then
         echo -e "\n