Remove the "seconds" parameter to fix tests. (#527)

* Remove seconds parameter

* Remove anoter seconds parameter

internal/driver/fetch_test.go

 	address := "https+insecure://" + l.Addr().String() + "/debug/pprof/goroutine"
 	s := &source{
 		Sources:   []string{address},
-		Seconds:   10,
 		Timeout:   10,
 		Symbolize: "remote",
 	}
 	address := "https://" + "localhost:" + portStr + "/debug/pprof/goroutine"
 	s := &source{
 		Sources:   []string{address},
-		Seconds:   10,
 		Timeout:   10,
 		Symbolize: "remote",
 	}