ARM: dts: exynos: Fix missing empty reg/ranges property regulators on Trats

Remove the regulators node entirely because its children do not have any
unit addresses.  This fixes DTC warning:

    Warning (simple_bus_reg): /regulators/regulator-0: missing or empty reg/ranges property
Signed-off-by: Krzysztof Kozlowski <krzk@kernel.org>
Tested-by: Marek Szyprowski <m.szyprowski@samsung.com>

arch/arm/boot/dts/exynos4210-trats.dts

@@ -30,9 +30,6 @@ chosen {
 		stdout-path = "serial2:115200n8";
 	};
 
-	regulators {
-		compatible = "simple-bus";
-
 	vemmc_reg: regulator-0 {
 		compatible = "regulator-fixed";
 		regulator-name = "VMEM_VDD_2.8V";
@@ -86,7 +83,6 @@ vt_core_15v_reg: regulator-5 {
 		gpio = <&gpe2 2 GPIO_ACTIVE_HIGH>;
 		enable-active-high;
 	};
-	};
 
 	gpio-keys {
 		compatible = "gpio-keys";