Use unp instead of custom extract script

scripts/extract

@@ -1,57 +0,0 @@
-#! /bin/sh
-
-extract() {
-  if [ -f "$1" ]; then
-    case "$1" in
-    *.tar.bz2)
-      command -v tar >/dev/null || sudo apt install -y tar
-      tar xjvf "$1"
-      ;;
-    *.tar.gz)
-      command -v tar >/dev/null || sudo apt install -y tar
-      tar xzvf "$1"
-      ;;
-    *.bz2)
-      command -v bunzip2 >/dev/null || sudo apt install -y bzip2
-      bunzip2 "$1"
-      ;;
-    *.rar)
-      command -v unrar >/dev/null || sudo apt install -y unrar
-      unrar e "$1"
-      ;;
-    *.gz)
-      command -v gunzip >/dev/null || sudo apt install -y gzip
-      gunzip "$1"
-      ;;
-    *.tar)
-      command -v tar >/dev/null || sudo apt install -y tar
-      tar xf "$1"
-      ;;
-    *.tbz2)
-      command -v tar >/dev/null || sudo apt install -y tar
-      tar xjf "$1"
-      ;;
-    *.tgz)
-      command -v tar >/dev/null || sudo apt install -y tar
-      tar xzf "$1"
-      ;;
-    *.zip)
-      command -v unzip >/dev/null || sudo apt install -y unzip
-      unzip "$1"
-      ;;
-    *.Z)
-      command -v uncompress >/dev/null || sudo apt install -y ncompress
-      uncompress "$1"
-      ;;
-    *.7z)
-      command -v 7z >/dev/null || sudo apt install -y p7zip
-      7z x "$1"
-      ;;
-    *)
-      echo "'$1' cannot be extracted via extract()"
-      ;;
-    esac
-  else
-    echo "'$1' is not a valid file"
-  fi
-}