HI!

Sorry for possible misunderstanding, the file:

/wp-content/themes/avxbuilder/socials-sharing.php 

Can you add screenshot what you need to remove?

The most simple way to remove sharing from the posts into use following css:

.single-post .socials-sharing {
    display: none;
}

The most simple way is to remove 

ct_socials_sharing();

From the

<?php if (get_post_type() == 'post') {   
echo get_the_tag_list('<div class="post-tags-list date-color">', '', '</div>');   
ct_socials_sharing();
} ?>

In the file:

/wp-content/themes/magna/content-page.php

(line  107)

it's template, just copy it to the child theme for the safety updates.

Welcome!