Fix duplicate 'const' warnings

Since the typedef of asn_INTEGER_specifics_t also contains a const the
compiler complained about:
"warning: duplicate ‘const’ [-Wpedantic]"
diff --git a/tests/50-constraint-OK.asn1.-Pgen-PER b/tests/50-constraint-OK.asn1.-Pgen-PER
index 96a4c75..8565ed5 100644
--- a/tests/50-constraint-OK.asn1.-Pgen-PER
+++ b/tests/50-constraint-OK.asn1.-Pgen-PER
@@ -4357,7 +4357,7 @@
 	1	/* two(2) */
 	/* This list is extensible */
 };
-static const asn_INTEGER_specifics_t asn_SPC_enum_c_specs_6 = {
+static asn_INTEGER_specifics_t asn_SPC_enum_c_specs_6 = {
 	asn_MAP_enum_c_value2enum_6,	/* "tag" => N; sorted by tag */
 	asn_MAP_enum_c_enum2value_6,	/* N => "tag"; sorted by N */
 	3,	/* Number of elements in the maps */
@@ -4727,7 +4727,7 @@
 	0,	/* one(0) */
 	1	/* two(1) */
 };
-static const asn_INTEGER_specifics_t asn_SPC_Enum0_specs_1 = {
+static asn_INTEGER_specifics_t asn_SPC_Enum0_specs_1 = {
 	asn_MAP_Enum0_value2enum_1,	/* "tag" => N; sorted by tag */
 	asn_MAP_Enum0_enum2value_1,	/* N => "tag"; sorted by N */
 	2,	/* Number of elements in the maps */
@@ -4919,7 +4919,7 @@
 	0,	/* one(0) */
 	1	/* two(1) */
 };
-static const asn_INTEGER_specifics_t asn_SPC_Enum1_specs_1 = {
+static asn_INTEGER_specifics_t asn_SPC_Enum1_specs_1 = {
 	asn_MAP_Enum1_value2enum_1,	/* "tag" => N; sorted by tag */
 	asn_MAP_Enum1_enum2value_1,	/* N => "tag"; sorted by N */
 	2,	/* Number of elements in the maps */