packages: Move remove(), pre_install(), post_install() to debfetcher

packages/spotify.debfetcher

@@ -7,21 +7,6 @@ PACKAGE="spotify-client"
 TS=$(date +%s)
 THIS_BASEDIR="/opt/spotify"
 
-remove()
-{
-    rm -rf -- "${DEBFETCHER_INSTALL_DESTDIR}/${THIS_BASEDIR}"
-}
-
-pre_install()
-{
-
-    CURRENT_DIR="${DEBFETCHER_INSTALL_DESTDIR}${THIS_BASEDIR}"
-
-    if [ -d "${CURRENT_DIR}" ] ; then
-      mv -- "${DEBFETCHER_INSTALL_DESTDIR}${THIS_BASEDIR}" "${DEBFETCHER_INSTALL_DESTDIR}${THIS_BASEDIR}_${TS}"
-    fi
-}
-
 install()
 {
     mkdir -p ${DEBFETCHER_INSTALL_DESTDIR}/${THIS_BASEDIR}
@@ -30,11 +15,3 @@ install()
 
     ln -sf ${DEBFETCHER_INSTALL_DESTDIR}/opt/spotify/spotify "${DEBFETCHER_BIN_SYMLINK_DIR}"
 }
-
-
-post_install()
-{
-    if [ ${KEEP_OLD} -eq 0 ] ; then
-        rm -rf -- "${DEBFETCHER_INSTALL_DESTDIR}${THIS_BASEDIR}_${TS}"
-    fi
-}