doc: fix for techdoc-3981

remove a section about drivers from nrfx doc

Signed-off-by: Bartosz Gentkowski <[email protected]>

Author: b-gent

doc/nrfx/nrfx.doxyfile.in

@@ -1031,7 +1031,7 @@ RECURSIVE              = YES
 # Note that relative paths are relative to the directory from which Doxygen is
 # run.
 
-EXCLUDE                =
+EXCLUDE                = @DOCSET_SOURCE_BASE@/nrfx/doc/nrf9230_engb.dox
 
 # The EXCLUDE_SYMLINKS tag can be used to select whether or not files or
 # directories that are symbolic links (a Unix file system feature) are excluded