spl: Remove CONFIG_SPL_BOARD_LOAD_IMAGE

This symbol has been unused in code for some time now, remove
the final references.

Signed-off-by: Tom Rini <trini@konsulko.com>
diff --git a/arch/sandbox/include/asm/spl.h b/arch/sandbox/include/asm/spl.h
index d25dc7c..bf5a585 100644
--- a/arch/sandbox/include/asm/spl.h
+++ b/arch/sandbox/include/asm/spl.h
@@ -6,8 +6,6 @@
 #ifndef __asm_spl_h
 #define __asm_spl_h
 
-#define CONFIG_SPL_BOARD_LOAD_IMAGE
-
 enum {
 	BOOT_DEVICE_BOARD,
 };
diff --git a/arch/x86/include/asm/spl.h b/arch/x86/include/asm/spl.h
index cc6cac0..483cf70 100644
--- a/arch/x86/include/asm/spl.h
+++ b/arch/x86/include/asm/spl.h
@@ -7,8 +7,6 @@
 #ifndef __asm_spl_h
 #define __asm_spl_h
 
-#define CONFIG_SPL_BOARD_LOAD_IMAGE
-
 enum {
 	BOOT_DEVICE_SPI_MMAP	= 10,
 	BOOT_DEVICE_FAST_SPI,
diff --git a/include/configs/chromebook_link.h b/include/configs/chromebook_link.h
index 96d5cf1..0787359 100644
--- a/include/configs/chromebook_link.h
+++ b/include/configs/chromebook_link.h
@@ -15,6 +15,4 @@
 #include <configs/x86-common.h>
 #include <configs/x86-chromebook.h>
 
-#define CONFIG_SPL_BOARD_LOAD_IMAGE
-
 #endif	/* __CONFIG_H */
diff --git a/include/configs/qemu-x86.h b/include/configs/qemu-x86.h
index e9dbd54..ba843e3 100644
--- a/include/configs/qemu-x86.h
+++ b/include/configs/qemu-x86.h
@@ -34,6 +34,4 @@
  *   - AHCI controller is supported for QEMU '-M q35' target
  */
 
-#define CONFIG_SPL_BOARD_LOAD_IMAGE
-
 #endif	/* __CONFIG_H */