Move appimage files to dedicated linux folder

browser/linux/resources/appimage/AppRun

@@ -8,6 +8,5 @@ export XDG_DATA_DIRS="${HERE}/usr/share/${XDG_DATA_DIRS:+:$XDG_DATA_DIRS}"
 export PERLLIB="${HERE}/usr/share/perl5/:${HERE}/usr/lib/perl5/${PERLLIB:+:$PERLLIB}"
 export GSETTINGS_SCHEMA_DIR="${HERE}/usr/share/glib-2.0/schemas/${GSETTINGS_SCHEMA_DIR:+:$GSETTINGS_SCHEMA_DIR}"
 export QT_PLUGIN_PATH="${HERE}/usr/lib/qt4/plugins/:${HERE}/usr/lib/i386-linux-gnu/qt4/plugins/:${HERE}/usr/lib/x86_64-linux-gnu/qt4/plugins/:${HERE}/usr/lib32/qt4/plugins/:${HERE}/usr/lib64/qt4/plugins/:${HERE}/usr/lib/qt5/plugins/:${HERE}/usr/lib/i386-linux-gnu/qt5/plugins/:${HERE}/usr/lib/x86_64-linux-gnu/qt5/plugins/:${HERE}/usr/lib32/qt5/plugins/:${HERE}/usr/lib64/qt5/plugins/${QT_PLUGIN_PATH:+:$QT_PLUGIN_PATH}"
-export MOZ_LEGACY_PROFILES=1
 EXEC=$(grep -e '^Exec=.*' "${HERE}"/*.desktop | head -n 1 | cut -d "=" -f 2 | cut -d " " -f 1)
 exec "${EXEC}" "$@"