ARM: dts: aspeed: Remove flash layout from Facebook AST2500 Common dtsi

Remove FMC flash layout from ast2500-facebook-netbmc-common.dtsi because
flash size and layout varies across different Facebook AST2500 OpenBMC
platforms.
Signed-off-by: Tao Ren <rentao.bupt@gmail.com>
Link: https://lore.kernel.org/r/20200824211948.12852-2-rentao.bupt@gmail.comSigned-off-by: Joel Stanley <joel@jms.id.au>

arch/arm/boot/dts/ast2500-facebook-netbmc-common.dtsi

@@ -47,25 +47,12 @@ fmc_flash0: flash@0 {
 		status = "okay";
 		m25p,fast-read;
 		label = "spi0.0";
-
-#include "facebook-bmc-flash-layout.dtsi"
 	};
 
 	fmc_flash1: flash@1 {
 		status = "okay";
 		m25p,fast-read;
 		label = "spi0.1";
-
-		partitions {
-			compatible = "fixed-partitions";
-			#address-cells = <1>;
-			#size-cells = <1>;
-
-			flash1@0 {
-				reg = <0x0 0x2000000>;
-				label = "flash1";
-			};
-		};
 	};
 };