added basic sortable to workout creation

data/schemas/exercise.js

@@ -1,20 +1,13 @@
 var Schema = require('mongoose').Schema;
 
-var Datafield = new Schema({
-  datafieldname: { type: String},
-  datafieldtype: { type: String}
-});
-
-
 var exerciseSchema = new Schema({
   name: {type: String, unique: true, required: true},
-  type: String,
   description: String,
   difficulty: Number,
   musclearray: [Number],
   keywords: [String],
   alternatives: [String],
-  datafields: [Datafield]
+  datafields: [String]
 });
 
 module.exports = exerciseSchema;