spl: remove duplicate SPL_MD5 option

There is another SPL_MD5 option defined in lib/Kconfig.
Renaming SPL_MD5_SUPPORT introduced duplicate option with
different description. As for now FIT and hash algorithm options
are not related to each others, removing a duplicate option seems OK.

Fixes: 4b00fd1a84c ("Kconfig: Rename SPL_MD5_SUPPORT to SPL_MD5")
Signed-off-by: Oleksandr Suvorov <oleksandr.suvorov@foundries.io>
diff --git a/common/spl/Kconfig b/common/spl/Kconfig
index bee231b..c66d70e 100644
--- a/common/spl/Kconfig
+++ b/common/spl/Kconfig
@@ -561,18 +561,6 @@
 	  for detected accidental image corruption. For secure applications you
 	  should consider SHA1 or SHA256.
 
-config SPL_MD5
-	bool "Support MD5"
-	depends on SPL_FIT
-	help
-	  Enable this to support MD5 in FIT images within SPL. An MD5
-	  checksum is a 128-bit hash value used to check that the image
-	  contents have not been corrupted. Note that MD5 is not considered
-	  secure as it is possible (with a brute-force attack) to adjust the
-	  image while still retaining the same MD5 hash value. For secure
-	  applications where images may be changed maliciously, you should
-	  consider SHA256 or SHA384.
-
 config SPL_FIT_IMAGE_TINY
 	bool "Remove functionality from SPL FIT loading to reduce size"
 	depends on SPL_FIT