ramips: drop obsolete arcs_cmdline override patch

CONFIG_MIPS_CMDLINE_FROM_DTB is set to 'y' for all ramips targets
already, which will ensure that the value of 'bootargs' will take
precedence over whatever is in arcs_cmdline.

Signed-off-by: Ilya Lipnitskiy <ilya.lipnitskiy@gmail.com>

target/linux/ramips/patches-5.10/313-MIPS-ralink-copy-the-commandline-from-the-devicetree.patch

@@ -1,21 +0,0 @@
-From 67b7bff0fd364c194e653f69baa623ba2141bd4c Mon Sep 17 00:00:00 2001
-From: John Crispin <blogic@openwrt.org>
-Date: Mon, 4 Aug 2014 18:46:02 +0200
-Subject: [PATCH 07/53] MIPS: ralink: copy the commandline from the devicetree
-
-Signed-off-by: John Crispin <blogic@openwrt.org>
----
- arch/mips/ralink/of.c |    2 ++
- 1 file changed, 2 insertions(+)
-
---- a/arch/mips/ralink/of.c
-+++ b/arch/mips/ralink/of.c
-@@ -80,6 +80,8 @@ void __init plat_mem_setup(void)
- 
- 	__dt_setup_arch(dtb);
- 
-+	strlcpy(arcs_cmdline, boot_command_line, COMMAND_LINE_SIZE);
-+
- 	of_scan_flat_dt(early_init_dt_find_memory, NULL);
- 	if (memory_dtb)
- 		of_scan_flat_dt(early_init_dt_scan_memory, NULL);