commit 063240f00b798d984b5c5214fd695697cf94a31a
Author: Daniel Swanson <popcorn.tomato.dude@gmail.com>
Date:   Sat Jun 12 15:13:00 2021 -0500

    drop ltstr

diff --git a/src/trx_compiler.h b/src/trx_compiler.h
index 6674cd7..86cb3dc 100644
--- a/src/trx_compiler.h
+++ b/src/trx_compiler.h
@@ -4,7 +4,6 @@
 #include <rtx_config.h>
 #include <apertium/transfer_data.h>
 #include <apertium/xml_reader.h>
-#include <lttoolbox/ltstr.h>
 #include <pattern.h>
 
 #include <libxml/xmlreader.h>