Not ideally to remove them in the first place, but if you insists.
Edit HTML/CSS of your theme:
Templates -> core -> front -> global -> breadcrumb
Look for: {lang="mark_site_read_button"} and <a title="{lang="home"}" href='{setting="base_url"}'>
Pinned topics prefix like IPB 3.4.x
IPB 4.x displays a different badge of version 3.x for pinned topics and featureds topics. For some reason some people - like me - prefer the badge as they were in the previous version of the software. It looked like a prefix.
IN FORUM ROW
GO TO: ACP > Customizations > Themes > YourTheme (</> EDIT HTML/CSS) - find: forums > front > forums > TopicRow
FIND:
{{if $row->mapped('pinned')}}
<span><span class="ipsBadge ipsBadge_icon ipsBadge_small ipsBadge_positive" data-ipsTooltip title='{lang="pinned"}'><i class='fa fa-thumb-tack'></i></span></span>
{{endif}}
REPLACE WITH:
{{if $row->mapped('pinned')}}
<span><span style='text-transform: uppercase' class="ipsBadge ipsBadge_positive" data-ipsTooltip title='{lang="pinned"}'>{lang="pinned"}</span></span>
{{endif}}
IN TOPIC HEADER
GO TO: ACP > Customizations > Themes > YourTheme (</> EDIT HTML/CSS) - find: topics > topic
FIND:
{{if $topic->mapped('pinned')}}
<span><span class="ipsBadge ipsBadge_icon ipsBadge_positive" data-ipsTooltip title='{lang="pinned"}'><i class='fa fa-thumb-tack'></i></span></span>
{{endif}}
REPLACE WITH:
{{if $topic->mapped('pinned')}}
<span><span style='text-transform:uppercase' class="ipsBadge ipsBadge_positive" data-ipsTooltip title='{lang="pinned"}'>{lang="pinned"}</span></span>
{{endif}}
Please don't use the word "urgent" in a topic title asking for something as trivial as changing site-wide font, least of all in CAPS-lock. I've adjusted the topic title accordingly.