Remove unused old exam selecter component

client/views/students/ExamSelector.jsx

-import React from 'react';
-
-const ExamSelector = (props) => (
-    <div className="control has-icons-left">
-        <div className="select is-info is-fullwidth">
-            <select value={props.exam.name} onChange={props.selectExam}>
-                {props.exam.list.map(ex =>
-                    <option key={ex.id}>{ex.name}</option>
-                )}
-            </select>
-        </div>
-        <span className="icon is-small is-left">
-            <i className="fa fa-pencil"></i>
-        </span>
-    </div>
-)
-
-export default ExamSelector;
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