staging: mt7621-dts: remove obsolete switch node

This was for OpenWrt's swconfig driver, which never made it upstream,
and was also superseded by MT7530 DSA driver.
Reviewed-by: Sergio Paracuellos <sergio.paracuellos@gmail.com>
Signed-off-by: DENG Qingfang <dqfext@gmail.com>
Link: https://lore.kernel.org/r/20210108025155.31556-1-dqfext@gmail.comSigned-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

drivers/staging/mt7621-dts/mt7621.dtsi

@@ -492,13 +492,6 @@ fixed-link {
 		};
 	};
 
-	gsw: gsw@1e110000 {
-		compatible = "mediatek,mt7621-gsw";
-		reg = <0x1e110000 0x8000>;
-		interrupt-parent = <&gic>;
-		interrupts = <GIC_SHARED 23 IRQ_TYPE_LEVEL_HIGH>;
-	};
-
 	pcie: pcie@1e140000 {
 		compatible = "mediatek,mt7621-pci";
 		reg = <0x1e140000 0x100     /* host-pci bridge registers */