get rid of some unused macros

src/vmod_re2.c

@@ -42,9 +42,6 @@
 #include "vcc_if.h"
 #include "vre2/vre2.h"
 
-#define ERR(ctx, msg) \
-        errmsg((ctx), "vmod re2 error: " msg)
-
 #define VERR(ctx, fmt, ...) \
         errmsg((ctx), "vmod re2 error: " fmt, __VA_ARGS__)
 
@@ -294,8 +291,6 @@ vmod_regex__fini(struct vmod_re2_regex **rep)
 	FREE_OBJ(re);
 }
 
-#define ERR_PREFIX "%s.match(\"%s\"): "
-
 VCL_BOOL
 vmod_regex_match(const struct vrt_ctx *ctx, struct vmod_re2_regex *re,
 		 VCL_STRING subject)
@@ -314,8 +309,6 @@ vmod_regex_match(const struct vrt_ctx *ctx, struct vmod_re2_regex *re,
 	return ret;
 }
 
-#undef ERR_PREFIX
-
 #define ERR_PREFIX "%s.backref(ref=%ld, fallback=\"%s\"): "
 
 VCL_STRING