The simplest way to remove buttons you don’t want is using Custom CSS. You can add Custom CSS to your WordPress site by going to Appearance->Customize->Additional CSS from your Dashboard. Here is an example that you can copy and paste as needed.

//remove Create Post Button
#lasso--post-new
{
   display: none;
}

//Aesop Components

//remove Image
.lasso-toolbar--component__image{
  display:none;
}

// remove character
.lasso-toolbar--component__character{
  display:none;
}

// remove quote
.lasso-toolbar--component__quote{
  display:none;
}

// remove content
.lasso-toolbar--component__content{
  display:none;
}

// remove collection
.lasso-toolbar--component__collection{
  display:none;
}

// remove audio
.lasso-toolbar--component__audio{
  display:none;
}

// remove video
.lasso-toolbar--component__video{
  display:none;
}