sh: Avoid some headers when NO_HISTORY is set.

This is more simpler compatibility with using this source on older
systems before libedit was made to install filecomplete.h in
commit b315a7296d.

bin/sh/input.c

@@ -59,7 +59,9 @@ __FBSDID("$FreeBSD$");
 #include "error.h"
 #include "alias.h"
 #include "parser.h"
+#ifndef NO_HISTORY
 #include "myhistedit.h"
+#endif
 #include "trap.h"
 
 #define EOF_NLEFT -99		/* value of parsenleft when EOF pushed back */

bin/sh/trap.c

@@ -58,7 +58,9 @@ __FBSDID("$FreeBSD$");
 #include "trap.h"
 #include "mystring.h"
 #include "builtins.h"
+#ifndef NO_HISTORY
 #include "myhistedit.h"
+#endif
 
 
 /*