Removed bloated include hierarchy graphs from file documentation.

It was unneeded anyway, the only purpose I can think of is to showcase
those pretty graphs, nothing more.

Doxyfile

@@ -1690,14 +1690,14 @@ TEMPLATE_RELATIONS     = NO
 # file showing the direct and indirect include dependencies of the file with
 # other documented files.
 
-INCLUDE_GRAPH          = YES
+INCLUDE_GRAPH          = NO
 
 # If the ENABLE_PREPROCESSING, SEARCH_INCLUDES, INCLUDED_BY_GRAPH, and
 # HAVE_DOT tags are set to YES then doxygen will generate a graph for each
 # documented header file showing the documented files that directly or
 # indirectly include this file.
 
-INCLUDED_BY_GRAPH      = YES
+INCLUDED_BY_GRAPH      = NO
 
 # If the CALL_GRAPH and HAVE_DOT options are set to YES then
 # doxygen will generate a call dependency graph for every global function
@@ -1725,7 +1725,7 @@ GRAPHICAL_HIERARCHY    = YES
 # in a graphical way. The dependency relations are determined by the #include
 # relations between the files in the directories.
 
-DIRECTORY_GRAPH        = YES
+DIRECTORY_GRAPH        = NO
 
 # The DOT_IMAGE_FORMAT tag can be used to set the image format of the images
 # generated by dot. Possible values are svg, png, jpg, or gif.