removed unused

conf/machine/boards/elphel393_alt/bootargs-mmc.dtsi

-/**/
-/ {
-	chosen {
-		bootargs = "cma=336M console=ttyPS0,115200 root=/dev/mmcblk0p2 rw ip=192.168.0.8 earlyprintk rootwait rootfstype=ext4";
-		linux,stdout-path = "/amba@0/serial@e0000000";
-	};
-};

conf/machine/boards/elphel393_alt/bootargs-nand.dtsi

-/**/
-/ {
-	chosen {
-		bootargs = "cma=336M console=ttyPS0,115200 root=ubi0:elphel393-rootfs rw ip=192.168.0.8 earlyprintk rootwait rootfstype=ubifs ubi.mtd=4,2048";
-		linux,stdout-path = "/amba@0/serial@e0000000";
-	};
-};

conf/machine/boards/elphel393_alt/bootargs-ram.dtsi

-/**/
-/ {
-	chosen {
-		bootargs = "cma=336M console=ttyPS0,115200 root=/dev/ram rw ip=192.168.0.8 earlyprintk ramdisk_size=262144";
-		linux,stdout-path = "/amba@0/serial@e0000000";
-	};
-};