Remove variation Image from gallery

Here you are.

### WordPress Environment ###

Home URL: https://pixelpreacher.net
Site URL: https://pixelpreacher.net
WC Version: 2.6.11
Log Directory Writable: ✔
WP Version: 4.9.9
WP Multisite: –
WP Memory Limit: 256 MB
WP Debug Mode: –
WP Cron: ✔
Language: en_US

### Server Environment ###

Server Info: Apache
PHP Version: 7.0.33-1+ubuntu18.04.1+deb.sury.org+1
PHP Post Max Size: 200 MB
PHP Time Limit: 60
PHP Max Input Vars: 5000
cURL Version: 7.58.0
OpenSSL/1.1.1a

SUHOSIN Installed: –
MySQL Version: 5.7.24
Max Upload Size: 200 MB
Default Timezone is UTC: ✔
fsockopen/cURL: ✔
SoapClient: ✔
DOMDocument: ✔
GZip: ✔
Multibyte String: ✔
Remote Post: ✔
Remote Get: ✔

### Database ###

WC Database Version: 2.6.11
: 
woocommerce_sessions: ✔
woocommerce_api_keys: ✔
woocommerce_attribute_taxonomies: ✔
woocommerce_downloadable_product_permissions: ✔
woocommerce_order_items: ✔
woocommerce_order_itemmeta: ✔
woocommerce_tax_rates: ✔
woocommerce_tax_rate_locations: ✔
woocommerce_shipping_zones: ✔
woocommerce_shipping_zone_locations: ✔
woocommerce_shipping_zone_methods: ✔
woocommerce_payment_tokens: ✔
woocommerce_payment_tokenmeta: ✔
MaxMind GeoIP Database: ✔

### Active Plugins (15) ###

Ultimate Addons for Visual Composer: by Brainstorm Force – 3.15.2
Chatra live chat software: by Chatra – 1.0.4
Contact Form 7: by Takayuki Miyoshi – 5.0.5
Product Sales Report Pro for WooCommerce: by Potent Plugins – 2.1.8
WPBakery Visual Composer: by Michael M - WPBakery.com – 5.0.1
Meta Box: by MetaBox.io – 4.15.6
Toolset Types: by OnTheGoSystems – 2.2.23
WooCommerce Google Analytics Pro: by WooThemes / SkyVerge – 1.1.7 – 1.6.5 is available
WooCommerce MailChimp: by Saint Systems – 2.1.12
WooCommerce: by WooThemes – 2.6.11
Yoast SEO Premium: by Team Yoast – 6.3.1
WP Rocket: by WP Media – 2.11.7
Smush: by WPMU DEV – 2.9.1
YITH WooCommerce Ajax Product Filter: by YITHEMES – 3.5.1
YITH WooCommerce Featured Video: by YITHEMES – 1.1.9

### Settings ###

Force SSL: –
Currency: USD ($)
Currency Position: left
Thousand Separator: ,
Decimal Separator: .
Number of Decimals: 0

### API ###

API Enabled: ✔

### WC Pages ###

Shop Base: #5 - /series/
Cart: #6 - /cart/
Checkout: #7 - /checkout/
My Account: #8 - /my-account/

### Taxonomies ###

Product Types: external (external)
grouped (grouped)
simple (simple)
variable (variable)

### Theme ###

Name: Storefront
Version: 1.6.1
Author URL: http://www.woothemes.com
Child Theme: ✔
Parent Theme Name: Storefront
Parent Theme Version: 1.6.1
Parent Theme Author URL: http://www.woothemes.com
WooCommerce Support: ✔

### Templates ###

Overrides: pixel-preacher-theme/woocommerce/archive-product.php
pixel-preacher-theme/woocommerce/cart/cart.php
pixel-preacher-theme/woocommerce/cart/mini-cart.php
pixel-preacher-theme/woocommerce/checkout/form-billing.php
pixel-preacher-theme/woocommerce/content-product.php
pixel-preacher-theme/content-single-product.php
pixel-preacher-theme/woocommerce/emails/customer-completed-order.php
pixel-preacher-theme/woocommerce/emails/customer-new-account.php
pixel-preacher-theme/woocommerce/emails/email-addresses.php
pixel-preacher-theme/woocommerce/emails/email-footer.php
pixel-preacher-theme/woocommerce/emails/email-header.php
pixel-preacher-theme/woocommerce/emails/email-styles.php
pixel-preacher-theme/woocommerce/myaccount/dashboard.php
pixel-preacher-theme/woocommerce/myaccount/navigation.php
pixel-preacher-theme/woocommerce/order/order-details-customer.php
pixel-preacher-theme/single-product/add-to-cart/variable.php
pixel-preacher-theme/single-product/add-to-cart/variation.php
pixel-preacher-theme/single-product/related.php
pixel-preacher-theme/single-product.php