fdo#63154 Removed unused solar.h ref. in basic, cui, forms and writerfilter.

Change-Id: I09cca73d8d77af259965e74e1b29a88aa5c315ab
Reviewed-on: https://gerrit.libreoffice.org/7731
Reviewed-by: Caolán McNamara <caolanm@redhat.com>
Tested-by: Caolán McNamara <caolanm@redhat.com>