Hello,
To remove the phone and address from the left add below given CSS by going to Admin Panel > Appearance > Customize > Additional CSS.
div#quick-contact {
display: none;
}
Now regarding your query, making it full width is full width is quite not possible with the minimal CSS but we can at least place it at the center and for this add below given CSS.
.site-branding {
float: none;
display: flex;
justify-content: center;
}
Hope this helps.
Regards!!