fdo#63154 Remove unused solar.h reference in sd.

Change-Id: I3dca2ffe3f94bedfea954bd83e84c724fb564ec9
Reviewed-on: https://gerrit.libreoffice.org/8063
Tested-by: LibreOffice gerrit bot <gerrit@libreoffice.org>
Reviewed-by: Marcos Souza <marcos.souza.org@gmail.com>