remove preinst script, not needed as we bumped our deps

debian/libvectorscan5.preinst

@@ -1,35 +0,0 @@
-#!/bin/sh
-
-set -e
-
-case "$1" in
-    install|upgrade)
-        if [ "$DEBIAN_FRONTEND" != noninteractive ] && \
-               [ -f /proc/cpuinfo ] && \
-               ! grep -q '^flags[[:space:]]*:.*[[:space:]]sse4_2[[:space:]]' /proc/cpuinfo
-        then
-            . /usr/share/debconf/confmodule
-            db_version 2.0
-            db_input critical libvectorscan/cpu-sse4_2 || true
-            db_go
-            db_get libhyperscan/cpu-sse42
-            if [ "$RET" = 'false' ]; then
-                echo 'Aborting installation because of missing SSE4.2 extension.' >&2
-                db_purge
-                exit 1
-            fi
-        fi
-    ;;
-
-    abort-upgrade)
-    ;;
-
-    *)
-        echo "preinst called with unknown argument \`$1'" >&2
-        exit 1
-    ;;
-esac
-
-#DEBHELPER#
-
-exit 0