How do i remove remove SORT BY Price, Position, Name in Magento 2.1?

Question

How do I remove the SORT BY Price, Position, Name in Magento 2.1?

Answer 1

1. Do not understand why you want to remove/hide this options.
2. You can hide or remove this visibility as added.
3. If you are using any THEME, change the code in theme level.

/vendor/magento/module-catalog/view/frontend/templates/product/list/toolbar/sorter.phtml

<?php
/**
 * Copyright © 2016 Magento. All rights reserved.
 * See COPYING.txt for license details.
 */

// @codingStandardsIgnoreFile

?>
<?php
/**
 * Product list toolbar
 *
 * @var $block \Magento\Catalog\Block\Product\ProductList\Toolbar
 */
use Magento\Catalog\Model\Product\ProductList\Toolbar;
?>
<div class="toolbar-sorter sorter">
    <label class="sorter-label" for="sorter"><?php /* @escapeNotVerified */ echo __('Sort By') ?></label>
    <select id="sorter" data-role="sorter" class="sorter-options">
        <?php foreach ($block->getAvailableOrders() as $_key => $_order): ?>
            <option value="<?php /* @escapeNotVerified */ echo $_key; ?>"
                <?php if ($block->isOrderCurrent($_key)): ?>
                    selected="selected"
                <?php endif; ?>
                >
                <?php echo $block->escapeHtml(__($_order)) ?>
            </option>
        <?php endforeach; ?>
    </select>
    <?php if ($block->getCurrentDirection() == 'desc'): ?>
        <a title="<?php /* @escapeNotVerified */ echo __('Set Ascending Direction') ?>" href="#" class="action sorter-action sort-desc" data-role="direction-switcher" data-value="asc">
            <span><?php /* @escapeNotVerified */ echo __('Set Ascending Direction') ?></span>
        </a>
    <?php else: ?>
        <a title="<?php /* @escapeNotVerified */ echo __('Set Descending Direction') ?>" href="#" class="action sorter-action sort-asc" data-role="direction-switcher" data-value="desc">
            <span><?php /* @escapeNotVerified */ echo __('Set Descending Direction') ?></span>
        </a>
    <?php endif; ?>
</div>

Replace to

<?php
/**
 * Copyright © 2016 Magento. All rights reserved.
 * See COPYING.txt for license details.
 */

// @codingStandardsIgnoreFile

?>
<?php
/**
 * Product list toolbar
 *
 * @var $block \Magento\Catalog\Block\Product\ProductList\Toolbar
 */
use Magento\Catalog\Model\Product\ProductList\Toolbar;
?>
<div class="toolbar-sorter sorter">
    <?php if ($block->getCurrentDirection() == 'desc'): ?>
        <a title="<?php /* @escapeNotVerified */ echo __('Set Ascending Direction') ?>" href="#" class="action sorter-action sort-desc" data-role="direction-switcher" data-value="asc">
            <span><?php /* @escapeNotVerified */ echo __('Set Ascending Direction') ?></span>
        </a>
    <?php else: ?>
        <a title="<?php /* @escapeNotVerified */ echo __('Set Descending Direction') ?>" href="#" class="action sorter-action sort-asc" data-role="direction-switcher" data-value="desc">
            <span><?php /* @escapeNotVerified */ echo __('Set Descending Direction') ?></span>
        </a>
    <?php endif; ?>
</div>

Not recommended to edit core module. create a new module/theme for use case.

Answer 2

You can use plugin for this case, because when you exclude the key in the template file, it will still sort the order of the products by position by default.

Vendor/Module/Plugin/Magento/Catalog/Block/Product/ProductList/Toolbar.php

namespace Vendor\Module\Plugin\Magento\Catalog\Block\Product\ProductList;

class Toolbar
{
    public function aroundGetAvailableOrders(
        \Magento\Catalog\Block\Product\ProductList\Toolbar $subject,
        \Closure $proceed
    ) {
        $result = $proceed();

        //make sure that each array key does exist, and then remove them
        if (array_key_exists('position', $result)) unset($result['position']);
        if (array_key_exists('name', $result)) unset($result['name']);
        if (array_key_exists('price', $result)) unset($result['price']);

        return $result;
    }
}

Vendor/Module/etc/di.xml

<?xml version="1.0" ?>
<config xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:noNamespaceSchemaLocation="urn:magento:framework:ObjectManager/etc/config.xsd">
    <type name="Magento\Catalog\Block\Product\ProductList\Toolbar">
        <plugin disabled="false" name="Vendore_Module_Plugin_Magento_Catalog_Block_Product_ProductList_Toolbar" sortOrder="10" type="Vendor\Module\Plugin\Magento\Catalog\Block\Product\ProductList\Toolbar"/>
    </type>
</config>

Answer 3

If you need to remove only the "Position" option in the select you can edit your sorter.phtml in this way (don't edit core module, create a new module)

<select id="sorter" data-role="sorter" class="sorter-options">
        <option value="placeholder"><?= /* @escapeNotVerified */ __('Sort By') ?></option>
        <?php foreach ($block->getAvailableOrders() as $_key => $_order):
            if ($_key == 'position'){ continue; }
            ?>

            <option value="<?= /* @escapeNotVerified */ $_key ?>"
                <?php if ($block->isOrderCurrent($_key)): ?>
                    selected="selected"
                <?php endif; ?>
                >
                <?= $block->escapeHtml(__($_order)) ?>
            </option>
        <?php endforeach; ?>
    </select>