doc: nrfxlib: drop warnings_filter

It is no longer needed after breathe removal.

Signed-off-by: Gerard Marull-Paretas <[email protected]>

Author: gmarull

doc/nrfxlib/conf.py

@@ -36,7 +36,6 @@
     "sphinxcontrib.mscgen",
     "inventory_builder",
     "zephyr.kconfig",
-    "zephyr.warnings_filter",
     "zephyr.external_content",
     "zephyr.doxyrunner",
     "zephyr.doxybridge",
@@ -75,10 +74,6 @@
 if nrf_mapping:
     intersphinx_mapping["nrf"] = nrf_mapping
 
-# -- Options for zephyr.warnings_filter ----------------------------------------
-
-warnings_filter_config = str(NRF_BASE / "doc" / "nrfxlib" / "known-warnings.txt")
-
 # -- Options for doxyrunner plugin ---------------------------------------------
 
 doxyrunner_doxygen = os.environ.get("DOXYGEN_EXECUTABLE", "doxygen")