message: tools: remove obsolete doxygen flags
diff: @@ -240,12 +240,6 @@ TAB_SIZE = 4
  ALIASES =
  -# This tag can be used to specify a number of word-keyword mappings (TCL only).
  -# A mapping has the form "name=value". For example adding "class=itcl::class"
  -# will allow you to use the command class in the itcl::class meaning.
  -
  -TCL_SUBST =
  -
  # Set the OPTIMIZE_OUTPUT_FOR_C tag to YES if your project consists of C sources
  # only. Doxygen will then generate output that is more tailored for C. For
  # instance, some of the names that are used will be different. The list of all
  @@ -2146,12 +2140,6 @@ EXTERNAL_GROUPS = YES
  EXTERNAL_PAGES = YES
  -# The PERL_PATH should be the absolute path and name of the perl script
  -# interpreter (i.e. the result of 'which perl').
  -# The default file (with absolute path) is: /usr/bin/perl.
  -
  -PERL_PATH = /usr/bin/perl
  -
  #---------------------------------------------------------------------------
  # Configuration options related to the dot tool
  #---------------------------------------------------------------------------
  @@ -2165,15 +2153,6 @@ PERL_PATH = /usr/bin/perl
  CLASS_DIAGRAMS = YES
  -# You can define message sequence charts within doxygen comments using the \msc
  -# command. Doxygen will then run the mscgen tool (see:
  -# http://www.mcternan.me.uk/mscgen/)) to produce the chart and insert it in the
  -# documentation. The MSCGEN_PATH tag allows you to specify the directory where
  -# the mscgen tool resides. If left empty the tool is assumed to be found in the
  -# default search path.
  -
  -MSCGEN_PATH =
  -
  # You can include diagrams made with dia in doxygen documentation. Doxygen will
  # then run dia to produce the diagram and insert it in the documentation. The
  # DIA_PATH tag allows you to specify the directory where the dia binary resides.
  