clean up unused imports to templating/helpers.rs
use std::str::FromStr;
use std::string::ToString;
-use std::collections::{BTreeMap, HashMap};
+use std::collections::HashMap;
use hcore::package::{PackageIdent, Identifiable};
use hcore::fs;
-use manager::service::config::{ServiceConfig, Svc};
+use manager::service::config::ServiceConfig;
use handlebars::{Handlebars, Helper, Renderable, RenderContext, RenderError, Context};
use serde_json;
use toml;
