fdo#63154 Removed unused solar.h ref. in basic and formula

Change-Id: Ibf30f29653568929e65ebd897cef474a6838d5cc
Reviewed-on: https://gerrit.libreoffice.org/7735
Reviewed-by: Caolán McNamara <caolanm@redhat.com>
Tested-by: Caolán McNamara <caolanm@redhat.com>