tests: internal: signv4: uncommented code that caused a leak

Signed-off-by: Leonardo Alminana <[email protected]>

tests/internal/signv4.c

@@ -443,7 +443,8 @@ static struct aws_test *aws_test_create(char *path, char *context,
     return awt;
 
  error:
-    //aws_test_destroy(awt);
+    aws_test_destroy(awt);
+
     return NULL;
 }