sandbox: drop CONFIG_SYS_RELOC_GD_ENV_ADDR

As we discussed in [1], this option is not needed for sandbox build.

[1] https://lists.denx.de/pipermail/u-boot/2020-February/400182.htmlSigned-off-by: NAKASHI Takahiro <takahiro.akashi@linaro.org>
Reviewed-by: NSimon Glass <sjg@chromium.org>

configs/sandbox64_defconfig

@@ -80,7 +80,6 @@ CONFIG_OF_CONTROL=y
 CONFIG_OF_LIVE=y
 CONFIG_OF_HOSTFILE=y
 CONFIG_DEFAULT_DEVICE_TREE="sandbox64"
-CONFIG_SYS_RELOC_GD_ENV_ADDR=y
 CONFIG_NETCONSOLE=y
 CONFIG_IP_DEFRAG=y
 CONFIG_REGMAP=y

configs/sandbox_defconfig

@@ -89,7 +89,6 @@ CONFIG_OF_CONTROL=y
 CONFIG_OF_LIVE=y
 CONFIG_OF_HOSTFILE=y
 CONFIG_DEFAULT_DEVICE_TREE="sandbox"
-CONFIG_SYS_RELOC_GD_ENV_ADDR=y
 CONFIG_NETCONSOLE=y
 CONFIG_IP_DEFRAG=y
 CONFIG_REGMAP=y

configs/sandbox_flattree_defconfig

@@ -63,7 +63,6 @@ CONFIG_AMIGA_PARTITION=y
 CONFIG_OF_CONTROL=y
 CONFIG_OF_HOSTFILE=y
 CONFIG_DEFAULT_DEVICE_TREE="sandbox"
-CONFIG_SYS_RELOC_GD_ENV_ADDR=y
 CONFIG_NETCONSOLE=y
 CONFIG_IP_DEFRAG=y
 CONFIG_REGMAP=y

configs/sandbox_spl_defconfig

@@ -79,7 +79,6 @@ CONFIG_SPL_OF_CONTROL=y
 CONFIG_OF_HOSTFILE=y
 CONFIG_DEFAULT_DEVICE_TREE="sandbox"
 CONFIG_SPL_OF_PLATDATA=y
-CONFIG_SYS_RELOC_GD_ENV_ADDR=y
 CONFIG_NETCONSOLE=y
 CONFIG_IP_DEFRAG=y
 CONFIG_SPL_DM=y