Revert "configs/sim/loadable: Add loadable demo for arch sim"

This reverts commit 2295a3c4d8.

configs/sim/README.txt

@@ -561,12 +561,6 @@ ipforward
   Additional required settings will also be selected when you manually
   select the above via 'make menuconfig'.
 
-loadable
-
-  This configuration provides an example of loadable apps.  It cannot used
-  with any Windows configuration, however, because Windows does not use
-  the ELF format.
-
 minibasic
 
   This configuration was used to test the Mini Basic port at

configs/sim/loadable/defconfig

@@ -1,46 +0,0 @@
-CONFIG_APPS_LOADABLE=y
-CONFIG_ARCH="sim"
-CONFIG_ARCH_BOARD="sim"
-CONFIG_ARCH_BOARD_SIM=y
-CONFIG_ARCH_SIM=y
-CONFIG_BINFMT_EXEPATH=y
-CONFIG_BOARDCTL_APP_SYMTAB=y
-CONFIG_BOARDCTL_POWEROFF=y
-CONFIG_BUILTIN=y
-CONFIG_CLOCK_MONOTONIC=y
-CONFIG_DEBUG_FEATURES=y
-CONFIG_DEBUG_SYMBOLS=y
-CONFIG_ELF=y
-CONFIG_EXAMPLES_HELLO=y
-CONFIG_EXAMPLES_HELLO_STACKSIZE=8192
-CONFIG_EXECFUNCS_HAVE_SYMTAB=y
-CONFIG_FS_HOSTFS=y
-CONFIG_FS_PROCFS=y
-CONFIG_IDLETHREAD_STACKSIZE=4096
-CONFIG_INIT_FILEPATH=y
-CONFIG_INIT_MOUNT_DATA="fs=../apps/exe/system"
-CONFIG_INIT_MOUNT_FLAGS=0x1
-CONFIG_INIT_MOUNT_FSTYPE="hostfs"
-CONFIG_INIT_MOUNT_TARGET="/system"
-CONFIG_LIBC_EXECFUNCS=y
-CONFIG_MEMSET_OPTSPEED=y
-CONFIG_NSH_ARCHINIT=y
-CONFIG_NSH_BUILTIN_APPS=y
-CONFIG_NSH_LINELEN=128
-CONFIG_NSH_READLINE=y
-CONFIG_PATH_INITIAL="/system/bin"
-CONFIG_RAW_BINARY=y
-CONFIG_READLINE_CMD_HISTORY=y
-CONFIG_READLINE_TABCOMPLETION=y
-CONFIG_SCHED_HAVE_PARENT=y
-CONFIG_SCHED_ONEXIT=y
-CONFIG_SCHED_WAITPID=y
-CONFIG_SDCLONE_DISABLE=y
-CONFIG_SIM_M32=y
-CONFIG_SIM_WALLTIME=y
-CONFIG_START_MONTH=6
-CONFIG_START_YEAR=2008
-CONFIG_SYSTEM_NSH=y
-CONFIG_TIME_EXTENDED=y
-CONFIG_USERMAIN_STACKSIZE=4096
-CONFIG_USER_INITPATH="/system/bin/nsh"