Magento – Remove Layered navigation – Magento 2

You can remove some option directly in your theme template (dirty hack):

app\design\frontend\base\default\template\catalog\layer\filter.phtml

after line
<?php foreach ($this->getItems() as $_item): ?>

add line
<?php if($_item->getLabel() == 'black') continue; ?>

The link you have posted is the correct solution.

You will need to create a local.xml file in your theme in the following directory.

app/design/frontend/yourtheme/yourpackage/layout/local.xml

You can then unset and set the block you wish to reposition.

 <?xml version="1.0"?>
<layout version="0.1.0">
    <catalog_category_layered>
        <reference name="left_first">
            <action method="unsetChild"><alias>catalog.leftnav</alias></action>
        </reference>
        <reference name="product_list">
            <action method="insert"><blockName>catalog.leftnav</blockName></action>
        </reference>
    </catalog_category_layered>
</layout>

After you have added your local xml and xml updates make sure you clear all Magento caches.