doc: boards: nxp: mcx_nx4x_evk: remove unnecessary index page
This intermediate index page is unnecessary and causes the boards that
are included in its toctree to appear in multiple toctrees, which is a
Sphinx warning.
Signed-off-by: Benjamin Cabé <benjamin@zephyrproject.org>
diff --git a/boards/nxp/mcx_nx4x_evk/doc/index.rst b/boards/nxp/mcx_nx4x_evk/doc/index.rst
deleted file mode 100644
index eaa339e..0000000
--- a/boards/nxp/mcx_nx4x_evk/doc/index.rst
+++ /dev/null
@@ -1,10 +0,0 @@
-.. _boards-mcx_nx4x_evk:
-
-MCX-NXXX-EVK
-############
-
-.. toctree::
- :maxdepth: 1
-
- mcx_n9xx_evk
- mcx_n5xx_evk
