Fix package build after dropping templates

After commit 7743e46f "Drop the LAVA templates moved to
apertis-test-cases" the package build failed with:

    cp -a templates /usr/src/packages/BUILD/debian/tmp/usr/lib/apertis-tests/
    cp: cannot stat 'templates': No such file or directory

Signed-off-by: Emanuele Aina <emanuele.aina@collabora.com>

debian/apertis-tests.install

@@ -15,7 +15,6 @@ usr/lib/apertis-tests/networking/proxy-manual/*.c
 usr/lib/apertis-tests/networking/proxy-manual/sites-available
 usr/lib/apertis-tests/resources
 usr/lib/apertis-tests/sdk
-usr/lib/apertis-tests/templates
 usr/lib/apertis-tests/tracker
 usr/share/dbus-1/services/org.apertis.ApertisTests.FailToActivate.service
 usr/share/dbus-1/system-services/org.apertis.ApertisTests.FailToActivate.service