Dead code removal from apps

Some miscellaneous removal of dead code from apps. Also fix an issue with
error handling with pkcs7.

Reviewed-by: Richard Levitte <levitte@openssl.org>

apps/pkcs7.c

diff --git a/apps/pkcs7.c b/apps/pkcs7.c
index 4d80f82..643507f 100644
--- a/apps/pkcs7.c
+++ b/apps/pkcs7.c
@@ -189,11 +189,11 @@
     if (infile == NULL)
         BIO_set_fp(in, stdin, BIO_NOCLOSE);
     else {
-        if (BIO_read_filename(in, infile) <= 0)
-            if (in == NULL) {
-                perror(infile);
-                goto end;
-            }
+        if (BIO_read_filename(in, infile) <= 0) {
+            BIO_printf(bio_err, "unable to load input file\n");
+            ERR_print_errors(bio_err);
+            goto end;
+        }
     }
 
     if (informat == FORMAT_ASN1)

apps/s_server.c

diff --git a/apps/s_server.c b/apps/s_server.c
index 874b402..ec2fe6f 100644
--- a/apps/s_server.c
+++ b/apps/s_server.c
@@ -303,7 +303,7 @@
     }
     if (s_debug)
         BIO_printf(bio_s_out, "identity_len=%d identity=%s\n",
-                   identity ? (int)strlen(identity) : 0, identity);
+                   (int)strlen(identity), identity);
 
     /* here we could lookup the given identity e.g. from a database */
     if (strcmp(identity, psk_identity) != 0) {