doxygen: Remove deprecated settings in common.doxy

doxygen: Remove deprecated settings in common.doxy

These Doxygen features are deprecated, as reported by Doxygen 1.8.9.1

Warning: Tag `USE_WINDOWS_ENCODING' at line 66 of file `common.doxy' has become obsolete.
         To avoid this warning please remove this line from your configuration file or upgrade it using "doxygen -u"
Warning: Tag `DETAILS_AT_TOP' at line 157 of file `common.doxy' has become obsolete.
         To avoid this warning please remove this line from your configuration file or upgrade it using "doxygen -u"
Warning: Tag `HTML_ALIGN_MEMBERS' at line 616 of file `common.doxy' has become obsolete.
         To avoid this warning please remove this line from your configuration file or upgrade it using "doxygen -u"
Warning: Tag `XML_SCHEMA' at line 848 of file `common.doxy' has become obsolete.
         To avoid this warning please remove this line from your configuration file or upgrade it using "doxygen -u"
Warning: Tag `XML_DTD' at line 854 of file `common.doxy' has become obsolete.
         To avoid this warning please remove this line from your configuration file or upgrade it using "doxygen -u"
Warning: Tag `MAX_DOT_GRAPH_WIDTH' at line 1115 of file `common.doxy' has become obsolete.
         To avoid this warning please remove this line from your configuration file or upgrade it using "doxygen -u"
Warning: Tag `MAX_DOT_GRAPH_HEIGHT' at line 1123 of file `common.doxy' has become obsolete.
         To avoid this warning please remove this line from your configuration file or upgrade it using "doxygen -u"

Signed-off-by: Rhys Kidd <rhyskidd@gmail.com>
Acked-by: Emil Velikov <emil.velikov@collabora.com>