Drop symbols file support

debian/gen-symbols

-#!/bin/sh
-
-set -e
-
-ARCH=`dpkg-architecture -qDEB_BUILD_ARCH`
-V=2
-
-PKGS="libvisp"
-
-for pkg in ${PKGS}; do
-    f=`echo ${pkg} | sed 's|-|_|g'`
-    pkgkde-gensymbols -p${pkg}${V} -v${V} -Osymbols-${pkg}.${ARCH} \
-	-edebian/${pkg}${V}/usr/lib/*/${f}.so.${V}
-    pkgkde-symbolshelper create -o debian/${pkg}${V}.symbols -v ${V} \
-	symbols-${pkg}.${ARCH}
-done