diff --git a/src/web/HTMLCategory.mjs b/src/web/HTMLCategory.mjs
deleted file mode 100755
index 95b8a4df..00000000
--- a/src/web/HTMLCategory.mjs
+++ /dev/null
@@ -1,59 +0,0 @@
-/**
- * @author n1474335 [n1474335@gmail.com]
- * @copyright Crown Copyright 2016
- * @license Apache-2.0
- */
-
-/**
- * Object to handle the creation of operation categories.
- */
-class HTMLCategory {
-
-    /**
-     * HTMLCategory constructor.
-     *
-     * @param {string} name - The name of the category.
-     * @param {boolean} selected - Whether this category is pre-selected or not.
-     */
-    constructor(name, selected) {
-        this.name = name;
-        this.selected = selected;
-        this.opList = [];
-    }
-
-
-    /**
-     * Adds an operation to this category.
-     *
-     * @param {HTMLOperation} operation - The operation to add.
-     */
-    addOperation(operation) {
-        this.opList.push(operation);
-    }
-
-
-    /**
-     * Renders the category and all operations within it in HTML.
-     *
-     * @returns {string}
-     */
-    toHtml() {
-        const catName = "cat" + this.name.replace(/[\s/-:_]/g, "");
-        let html = `<div class="panel category">
-        <a class="category-title" data-toggle="collapse" data-target="#${catName}">
-            ${this.name}
-        </a>
-        <div id="${catName}" class="panel-collapse collapse ${(this.selected ? " show" : "")}" data-parent="#categories">
-            <ul class="op-list">`;
-
-        for (let i = 0; i < this.opList.length; i++) {
-            html += this.opList[i].toStubHtml();
-        }
-
-        html += "</ul></div></div>";
-        return html;
-    }
-
-}
-
-export default HTMLCategory;