Clean up the printfs

Author: piki

sql/auth/sql_security_ctx.cc

@@ -848,17 +848,12 @@ void Security_context::assign_user(const char *user_arg,
 char *rows_read_exclude_users = nullptr;
 
 void Security_context::recheck_exclude_rows_read() {
-  printf("PIKI: recheck_exclude_rows_read: user=\"%s\"\n", m_user.ptr());
-
   m_exclude_user_from_rows_read = false;
   if (rows_read_exclude_users) {
-    printf("PIKI: rows_read_exclude_users=\"%s\"\n", rows_read_exclude_users);
     char *copy = strdup(rows_read_exclude_users);
     char *saveptr, *tok;
     for (tok=my_strtok_r(copy, ",", &saveptr); tok; tok=my_strtok_r(NULL, ",", &saveptr)) {
-      printf("PIKI: tok=\"%s\"\n", tok);
       if (!strcmp(tok, m_user.ptr())) {
-        printf("PIKI: yes, exclude them!\n");
         m_exclude_user_from_rows_read = true;
         break;
       }