.github/workflows/write-dockerfile.sh: delete pkgs line

Don't know what it does, but now it's not there.

Author: orlitzky

.github/workflows/write-dockerfile.sh

@@ -281,7 +281,6 @@ $ADD src/doc/bootstrap /new/src/doc/bootstrap
 $ADD src/meson.build /new/src/
 $ADD src/bin /new/src/bin
 $ADD m4 /new/m4
-$ADD pkgs /new/pkgs
 $ADD build /new/build
 $ADD .upstream.d /new/.upstream.d
 $ADD tools /new/tools