Build without spatialite

libspatialite7 in focal depends on libproj15, which conflicts with
libproj22, and so installs of this fail.

I could build libspatialite7 again to depend on libproj22 but where will
it end? I don't need libspatialite atm

gdal/debian/control

@@ -36,7 +36,6 @@ Build-Depends: debhelper-compat (= 10),
                libpq-dev,
                libproj-dev (>= 6.0.0),
                libqhull-dev,
-               libspatialite-dev,
                libsqlite3-dev,
                liburiparser-dev,
                libwebp-dev,
@@ -116,7 +115,6 @@ Depends: libgdal29 (= ${binary:Version}),
          libpq-dev,
          libproj-dev (>= 6.0.0),
          libqhull-dev,
-         libspatialite-dev,
          libsqlite3-dev,
          libtiff-dev,
          liburiparser-dev,

gdal/debian/rules

@@ -159,7 +159,7 @@ override_dh_auto_configure:
 			--with-proj=yes \
 			--with-qhull=yes \
 			--with-sosi=yes \
-			--with-spatialite=/usr \
+			--with-spatialite=no \
 			--with-sqlite3 \
 			--with-webp \
 			--with-xerces \