maint: expr: remove unnecessary xstrtol.h include

It has not been needed since commit 130464448 (maint: use Gnulib libgmp
module, 2020-07-07).

* src/expr.c: Don't include xstrtol.h.

diff --git a/src/expr.c b/src/expr.c
index 7f797a5598cd1ae55b7a7abb038ccf3b0c7a0a57..94522b2649e2f74491953cf88a98a08d1e1e44b5 100644 (file)
--- a/src/expr.c
+++ b/src/expr.c
@@ -39,7 +39,6 @@
 #include "long-options.h"
 #include "mcel.h"
 #include "strnumcmp.h"
-#include "xstrtol.h"
 
 /* Various parts of this code assume size_t fits into unsigned long
    int, the widest unsigned type that GMP supports.  */