message: tools: remove outdated doxygen setting
diff: @@ -1074,13 +1074,6 @@ VERBATIM_HEADERS = YES
  ALPHABETICAL_INDEX = YES
  -# The COLS_IN_ALPHA_INDEX tag can be used to specify the number of columns in
  -# which the alphabetical index list will be split.
  -# Minimum value: 1, maximum value: 20, default value: 5.
  -# This tag requires that the tag ALPHABETICAL_INDEX is set to YES.
  -
  -COLS_IN_ALPHA_INDEX = 5
  -
  # In case all classes in a project start with a common prefix, all classes will
  # be put under the same header in the alphabetical index. The IGNORE_PREFIX tag
  # can be used to specify a prefix (or a list of prefixes) that should be ignored
  