Do not need inline-C any more

src/tests/wadj_basic.vtc

@@ -30,8 +30,7 @@ server s3 {
 
 varnish v1 -arg "-p vcc_allow_inline_c=true" -vcl+backend {
 	import ${vmod_weightadjust};
-
-	C{#include <unistd.h>}C
+	import vtc;
 
 	backend s1_hosthdr {
 	    .host = "${s1_addr}";
@@ -48,11 +47,11 @@ varnish v1 -arg "-p vcc_allow_inline_c=true" -vcl+backend {
 
 	sub vcl_recv {
 	    if (req.url == "/1") {
-		C{sleep(1);}C
+		vtc.sleep(1s);
 		foo.add_backend(backend=s1_hosthdr, weight=1,
 				weight_update = "^X-Weight: (\d+\.\d+)",
 				interval = 1h);
-		C{sleep(1);}C
+		vtc.sleep(1s);
 		foo.remove_backend(backend=s1);
 		return (synth(200));
 	    }
@@ -61,7 +60,7 @@ varnish v1 -arg "-p vcc_allow_inline_c=true" -vcl+backend {
 				url = "/otherurl",
 				weight_update = "inthebody.*(\d+\.\d+)",
 				interval = 1h);
-		C{sleep(1);}C
+		vtc.sleep(1s);
 		return (synth(200));
 	    }
 	    if (req.url == "/3") {
@@ -72,7 +71,7 @@ Host: weighthost
 "},
 				weight_update = "^X-Weight: ([\d.]+)",
 				interval = 1h);
-		C{sleep(1);}C
+		vtc.sleep(1s);
 		return (synth(200));
 	    }
 	    return (synth(400));