don't generate the outdated documentation for now

doc/Doxyfile

@@ -940,8 +940,7 @@ WARN_LOGFILE           = Doxygen.log
 # spaces. See also FILE_PATTERNS and EXTENSION_MAPPING
 # Note: If this tag is empty the current directory is searched.
 
-INPUT                  = . \
+INPUT                  = classes \
-                         classes \
                          ../src \
                          tutorials \
                          ../README.md
@@ -1317,7 +1316,7 @@ HTML_FILE_EXTENSION    = .html
 # of the possible markers and block names see the documentation.
 # This tag requires that the tag GENERATE_HTML is set to YES.
 
-HTML_HEADER            = api/header.html
+HTML_HEADER            = header.html
 
 # The HTML_FOOTER tag can be used to specify a user-defined HTML footer for each
 # generated HTML page. If the tag is left blank doxygen will generate a standard
@@ -1327,7 +1326,7 @@ HTML_HEADER            = api/header.html
 # that doxygen normally uses.
 # This tag requires that the tag GENERATE_HTML is set to YES.
 
-HTML_FOOTER            = api/footer.html
+HTML_FOOTER            = footer.html
 
 # The HTML_STYLESHEET tag can be used to specify a user-defined cascading style
 # sheet that is used by each HTML page. It can be used to fine-tune the look of