lib: delete unused crypto header includes

Tested OK with full non-unity CI run.

Closes #19225

lib/curl_ntlm_core.c

@@ -69,7 +69,6 @@
 
 #ifdef USE_OPENSSL
 #  include <openssl/des.h>
-#  include <openssl/md5.h>
 #  include <openssl/ssl.h>
 #  include <openssl/rand.h>
 #  ifdef OPENSSL_IS_AWSLC  /* for versions 1.2.0 to 1.30.1 */
@@ -79,7 +78,6 @@
 #else
 #  include <wolfssl/options.h>
 #  include <wolfssl/openssl/des.h>
-#  include <wolfssl/openssl/md5.h>
 #  include <wolfssl/openssl/ssl.h>
 #  include <wolfssl/openssl/rand.h>
 #  ifdef OPENSSL_COEXIST

lib/curl_sasl.c

@@ -43,7 +43,6 @@
 #include "urldata.h"
 
 #include "curlx/base64.h"
-#include "curl_md5.h"
 #include "vauth/vauth.h"
 #include "cfilters.h"
 #include "vtls/vtls.h"

lib/md4.c

@@ -28,7 +28,6 @@
 
 #include <string.h>
 
-#include "strdup.h"
 #include "curl_md4.h"
 #include "curlx/warnless.h"
 

lib/vauth/ntlm.c

@@ -40,7 +40,6 @@
 #include "../curl_ntlm_core.h"
 #include "../curl_gethostname.h"
 #include "../curlx/multibyte.h"
-#include "../curl_md5.h"
 #include "../curlx/warnless.h"
 #include "../rand.h"
 #include "../vtls/vtls.h"

lib/vssh/libssh2.c

@@ -69,7 +69,6 @@
 #include "curl_path.h"
 #include "../curlx/strparse.h"
 #include "../curlx/base64.h" /* for base64 encoding/decoding */
-#include "../curl_sha256.h"
 
 /* The last 2 #include files should be in this order */
 #include "../curl_memory.h"

lib/vtls/vtls.c

@@ -67,7 +67,6 @@
 #include "../multiif.h"
 #include "../curlx/fopen.h"
 #include "../curlx/timeval.h"
-#include "../curl_md5.h"
 #include "../curl_sha256.h"
 #include "../curlx/warnless.h"
 #include "../curlx/base64.h"