[nrf noup] boards: nordic: 7002dk_ns: Fix missing co-ex

The file has been removed upstream, but as upstream doesn't have NS
support, this need to be fixed explicitly.

Upstream PR: zephyrproject-rtos/zephyr#79606

Signed-off-by: Chaitanya Tata <[email protected]>
(cherry picked from commit 9236bc2)

Author: krish2718

boards/nordic/nrf7002dk/nrf7002dk_nrf5340_cpuapp_nrf7001_ns.dts

@@ -35,6 +35,5 @@
 		qspi-quad-mode;
 
 		#include "nrf70_common.dtsi"
-		#include "nrf70_common_coex.dtsi"
 	};
 };

boards/nordic/nrf7002dk/nrf7002dk_nrf5340_cpuapp_ns.dts

@@ -35,7 +35,6 @@
 		qspi-quad-mode;
 
 		#include "nrf70_common.dtsi"
-		#include "nrf70_common_coex.dtsi"
 		#include "nrf70_common_5g.dtsi"
 	};
 };