arm: dts: ti: omap: am5729-beagleboneai: Drop the OPP

opp_slow is not defined in the table in dra7 or derivatives, drop the
definition.
Signed-off-by: Nishanth Menon <nm@ti.com>
Message-ID: <20230724153911.1376830-3-nm@ti.com>
Signed-off-by: Tony Lindgren <tony@atomide.com>

arch/arm/boot/dts/ti/omap/am5729-beagleboneai.dts

@@ -677,12 +677,6 @@ &i2c4 {
 	clock-frequency = <100000>;
 };
 
-&cpu0_opp_table {
-	opp_slow-500000000 {
-		opp-shared;
-	};
-};
-
 &ipu2 {
 	status = "okay";
 	memory-region = <&ipu2_memory_region>;