debian/changelog

+qgis (3.4.13+dfsg-2) unstable; urgency=medium
+
+  * Drop python-gdal dependency, scripts moved to gdal-bin in 2.4.3+dfsg-1.
+
+ -- Bas Couwenberg <sebastic@debian.org>  Tue, 05 Nov 2019 05:49:05 +0100
+
 qgis (3.4.13+dfsg-1) unstable; urgency=medium
 
   * Drop unused override for sphinxdoc-but-no-sphinxdoc-depends.

debian/control

@@ -366,7 +366,6 @@ Package: python3-qgis-common
 Architecture: all
 Section: python
 Depends: gdal-bin,
-         python-gdal,
          python3-gdal,
          python3-matplotlib,
          libqgis-customwidgets (>= ${source:Version}),