remove compiler warning (unused variable)
diff --git a/src/cff/cffgload.c b/src/cff/cffgload.c
index d38d683..a4b55db 100644
--- a/src/cff/cffgload.c
+++ b/src/cff/cffgload.c
@@ -2281,7 +2281,6 @@
     FT_Bool      hinting;
     CFF_Font     cff      = (CFF_Font)face->extra.data;
 
-    FT_Bool      use_font_matrix;
     FT_Matrix    font_matrix;
     FT_Vector    font_offset;