Hm, the dependency is in debian/control of the navit package - remove that and it should not ask about it being pulled.
Depends: libc6 (>= 2.5.0-1), libdbus-1-3 (>= 1.1.4), libdbus-glib-1-2 (>= 0.76), libfontconfig1 (>= 2.6.0), libfreetype6 (>= 2.3.9), libfribidi0 (>= 0.10.4-5), libgcc1 (>= 1:4.4.0), libgconf2-6 (>= 2.13.5), libglib2.0-0 (>= 2.20.0), liblocation0, libosso1 (>= 2.23), libspeechd2, libssl0.9.8 (>= 0.9.8m-1), zlib1g (>= 1:1.2.1), navit-data (= 0.5.0+dfsg.1-1maemo1~6010), navit-gui-internal (= 0.5.0+dfsg.1-1maemo1~6010) | navit-gui-gtk (= 0.5.0+dfsg.1-1maemo1~6010) | navit-gui-qml (= 0.5.0+dfsg.1-1maemo1~6010), libfreetype6 (>= 2.3.9-1osso2+0m5.1) | libfreetype6-navit
Build-Depends: debhelper (>= 5), automake1.9, libtool, quilt, libdevil-dev, libhildon1-dev, libqt4-dev (>= 4.7), libspeechd-dev, libespeak-dev, libimlib2-dev, libdbus-1-dev, libxml2-dev, libfribidi-dev, libpq-dev, libfreetype6-navit-dev, libfontconfig1-dev, libdbus-glib-1-dev, libgypsy-dev, liblocation-dev, libosso-dev, librsvg2-bin