In our themes you can hide different elements in the Customizer.
Just goto
Appearance > Customize > Other
You can hide the entire date and author line or just specific elements like date, author, category or comments.
You can also control featured images, search forms and more.
If you’d like to hide any element you can use CSS and the display:none value
Here’s a link to my video which shows how to use Additional CSS as well as identify any element you want to hide.
For example:
If you want to hide the date, category or comments on the “next/previous” posts use this CSS
.post-meta-cats {display:none;}
.post-meta-date {display:none;}
.post-meta-comments {display:none;}