Avoid duplicate TLS stub error symbol

ober

8bbb9af4e790dfd98fabd9bfeee6d9ca79601864

diff --git a/support/jemacs_tls_stubs.c b/support/jemacs_tls_stubs.c
index 7ad012b..cf4c7c9 100644
--- a/support/jemacs_tls_stubs.c
+++ b/support/jemacs_tls_stubs.c
@@ -2,23 +2,6 @@
 
 #include <stddef.h>
 #include <stdint.h>
-#include <string.h>
-
-size_t jerboa_last_error(uint8_t *buf, size_t len) {
-    const char *msg = "TLS not available in jemacs test stub";
-    size_t msg_len = strlen(msg);
-    size_t copy_len = msg_len;
-
-    if (len == 0) {
-        return msg_len;
-    }
-    if (copy_len >= len) {
-        copy_len = len - 1;
-    }
-    memcpy(buf, msg, copy_len);
-    buf[copy_len] = 0;
-    return copy_len;
-}
 
 uint64_t jerboa_tls_server_new(const char *cert, const char *key) {
     (void)cert;