How to remove permalinks links presents in each page of my site?

You can do this in 2 ways:

Remove it from HTML source code (harder, but more correct)

Find <footer class="post-meta"> in your theme files, and remove (or comment) it (with contents). You will see something like this in one of your files:

<footer class="post-meta">
    ...
    <a href="https://wordpress.stackexchange.com/questions/105324/...</a>
    ...
</footer>

Just remove this part of code or comment it. (Of course don”t forget to backup these files before modyfying them).

Hide it with CSS

To do it, just add this:

footer.post-meta {
    display: none;
}

to your CSS file.