Remove HAVE_OT

We never tested compiling without it.  Just kill it.  We always build
our own shaper.
diff --git a/test/api/test-c.c b/test/api/test-c.c
index 78d6e97..061f35c 100644
--- a/test/api/test-c.c
+++ b/test/api/test-c.c
@@ -32,6 +32,7 @@
 #endif
 
 #include <hb.h>
+#include <hb-ot.h>
 
 #ifdef HAVE_GLIB
 #include <hb-glib.h>
@@ -45,10 +46,6 @@
 #include <hb-ft.h>
 #endif
 
-#ifdef HAVE_OT
-#include <hb-ot.h>
-#endif
-
 #ifdef HAVE_UNISCRIBE
 #include <hb-uniscribe.h>
 #endif