Disable SDL_GetBasePath implementation, not functional.

Index: src/filesystem/unix/SDL_sysfilesystem.c
--- src/filesystem/unix/SDL_sysfilesystem.c.orig
+++ src/filesystem/unix/SDL_sysfilesystem.c
@@ -95,24 +95,6 @@ SDL_GetBasePath(void)
         }
     }
 #endif
-#if defined(__OPENBSD__)
-    char **retvalargs;
-    size_t len;
-    const int mib[] = { CTL_KERN, KERN_PROC_ARGS, getpid(), KERN_PROC_ARGV };
-    if (sysctl(mib, 4, NULL, &len, NULL, 0) != -1) {
-        retvalargs = SDL_malloc(len);
-        if (!retvalargs) {
-            SDL_OutOfMemory();
-            return NULL;
-        }
-        sysctl(mib, 4, retvalargs, &len, NULL, 0);
-        retval = SDL_malloc(PATH_MAX + 1);
-        if (retval)
-            realpath(retvalargs[0], retval);
-
-        SDL_free(retvalargs);
-    }
-#endif
 #if defined(__SOLARIS__)
     const char *path = getexecname();
     if ((path != NULL) && (path[0] == '/')) { /* must be absolute path... */