move setProviders to EmbarkJS

lib/modules/storage/embarkjs.js

@@ -1,37 +1,2 @@
 /* global EmbarkJS */
 
-import {detectSeries} from 'async';
-
-let __embarkStorage = {};
-
-__embarkStorage.setProviders = async function (dappConnOptions) {
-    try {
-      await detectSeries(dappConnOptions, async (dappConn, callback) => {
-        if(dappConn === '$BZZ' || dappConn.provider === 'swarm'){
-          let options = dappConn;
-          if(dappConn === '$BZZ') options = {"useOnlyGivenProvider": true};
-          try{
-            await EmbarkJS.Storage.setProvider('swarm', options);
-            let isAvailable = await EmbarkJS.Storage.isAvailable();
-            callback(null, isAvailable);
-          }catch(err){
-            callback(null, false); // catch errors for when bzz object not initialised but config has requested it to be used
-          }
-        }
-        else if(dappConn.provider === 'ipfs') {
-          // set the provider then check the connection, if true, use that provider, else, check next provider
-          try{
-            await EmbarkJS.Storage.setProvider('ipfs', dappConn);
-            let isAvailable =  await EmbarkJS.Storage.isAvailable();
-            callback(null, isAvailable);
-          } catch(err) {
-            callback(null, false); // catch but keep looping by not passing err to callback
-          }
-        }
-      }, function(err, result){
-        if(!result) throw new Error('Could not connect to a storage provider using any of the dappConnections in the storage config');
-      });
-    } catch (err) {
-      throw new Error('Failed to connect to a storage provider: ' + err.message);
-    }
-  };