refactor: Disable Graph generation in Doxygen

I usually don't find these helpful and they take up a lot of space in
the output web page.

docs/api/Doxyfile.cmake

@@ -2501,7 +2501,7 @@ DOT_FONTPATH           =
 # Possible values are: NO, YES, TEXT, GRAPH and BUILTIN.
 # The default value is: YES.
 
-CLASS_GRAPH            = YES
+CLASS_GRAPH            = NO
 
 # If the COLLABORATION_GRAPH tag is set to YES then doxygen will generate a
 # graph for each documented class showing the direct and indirect implementation
@@ -2513,7 +2513,7 @@ CLASS_GRAPH            = YES
 # The default value is: YES.
 # This tag requires that the tag HAVE_DOT is set to YES.
 
-COLLABORATION_GRAPH    = YES
+COLLABORATION_GRAPH    = NO
 
 # If the GROUP_GRAPHS tag is set to YES then doxygen will generate a graph for
 # groups, showing the direct groups dependencies. Explicit enabling a group
@@ -2524,7 +2524,7 @@ COLLABORATION_GRAPH    = YES
 # The default value is: YES.
 # This tag requires that the tag HAVE_DOT is set to YES.
 
-GROUP_GRAPHS           = YES
+GROUP_GRAPHS           = NO
 
 # If the UML_LOOK tag is set to YES, doxygen will generate inheritance and
 # collaboration diagrams in a style similar to the OMG's Unified Modeling
@@ -2586,7 +2586,7 @@ TEMPLATE_RELATIONS     = NO
 # The default value is: YES.
 # This tag requires that the tag HAVE_DOT is set to YES.
 
-INCLUDE_GRAPH          = YES
+INCLUDE_GRAPH          = NO
 
 # If the INCLUDED_BY_GRAPH, ENABLE_PREPROCESSING and SEARCH_INCLUDES tags are
 # set to YES then doxygen will generate a graph for each documented file showing
@@ -2598,7 +2598,7 @@ INCLUDE_GRAPH          = YES
 # The default value is: YES.
 # This tag requires that the tag HAVE_DOT is set to YES.
 
-INCLUDED_BY_GRAPH      = YES
+INCLUDED_BY_GRAPH      = NO
 
 # If the CALL_GRAPH tag is set to YES then doxygen will generate a call
 # dependency graph for every global function or class method.
@@ -2641,7 +2641,7 @@ GRAPHICAL_HIERARCHY    = YES
 # The default value is: YES.
 # This tag requires that the tag HAVE_DOT is set to YES.
 
-DIRECTORY_GRAPH        = YES
+DIRECTORY_GRAPH        = NO
 
 # The DIR_GRAPH_MAX_DEPTH tag can be used to limit the maximum number of levels
 # of child directories generated in directory dependency graphs by dot.