I have a feeling you might be editing the wrong file if you aren't seeing what you're looking for. The extra code you pasted is bootstrap3, whereas HubSpot uses bootstrap2. So, that leads me to believe that is custom code put into a template by a developer instead of wrapper code from hubspot.
If you are just making a blog template, {{content.post_body}} should not come with a wrapper. The only time you use no_wrapper="true" is when you want to use HUBL tags -
<span class="token punctuation">{</span>% color <span class="token string">"my_color_picker"</span> label=<span class="token string">'Choose a color'</span>, color=<span class="token string">'#000000'</span>, no_wrapper=True %<span class="token punctuation">}</span>
I have a feeling you might be editing the wrong file if you aren't seeing what you're looking for. The extra code you pasted is bootstrap3, whereas HubSpot uses bootstrap2. So, that leads me to believe that is custom code put into a template by a developer instead of wrapper code from hubspot.
Yeah it seems you pin pointed me to the solution. My content publishers copy'ed way to much html (including those i mentioned) from our current sites in the blog posts.