package/libopenssl: md5 is not optional

Commit a83d41867c8d (package/libopenssl: add option to enable some
features) made md5 an optional feature.

However, md5 has not been optional since 1.1.0, released in 2016.

Drop that option.

Fixes:
   - http://autobuild.buildroot.net/results/9d79c9f313ff989449e9b47c1ff0afd3a167fd2d/

Reported-by: "Weber, Matthew L Collins" <Matthew.Weber@collins.com>
Reviewed-by: "Matthew Weber" <Matthew.Weber@collins.com>
Signed-off-by: Yann E. MORIN <yann.morin.1998@free.fr>

package/libopenssl/Config.in

@@ -64,10 +64,6 @@ config BR2_PACKAGE_LIBOPENSSL_ENABLE_MD4
 	bool "enable MD4"
 	default y
 
-config BR2_PACKAGE_LIBOPENSSL_ENABLE_MD5
-	bool "enable MD5"
-	default y
-
 config BR2_PACKAGE_LIBOPENSSL_ENABLE_MDC2
 	bool "enable MDC2"
 	default y

package/libopenssl/libopenssl.mk

@@ -90,7 +90,6 @@ define LIBOPENSSL_CONFIGURE_CMDS
 			$(if $(BR2_PACKAGE_LIBOPENSSL_ENABLE_RC4),,no-rc4) \
 			$(if $(BR2_PACKAGE_LIBOPENSSL_ENABLE_MD2),,no-md2) \
 			$(if $(BR2_PACKAGE_LIBOPENSSL_ENABLE_MD4),,no-md4) \
-			$(if $(BR2_PACKAGE_LIBOPENSSL_ENABLE_MD5),,no-md5) \
 			$(if $(BR2_PACKAGE_LIBOPENSSL_ENABLE_MDC2),,no-mdc2) \
 			$(if $(BR2_PACKAGE_LIBOPENSSL_ENABLE_BLAKE2),,no-blake2) \
 			$(if $(BR2_PACKAGE_LIBOPENSSL_ENABLE_IDEA),,no-idea) \