[Theme: Minimalist] Remove Customize

Go to the theme editor.
There read the php code for de SIDEBAR, theres the DIV of the Customize, you can delete it from the line that reads the word “Customize” to the next “/div” tag.

Update it. Voila! There’s no more option. If you think you would need it later, instead of deleting cut it, and paste it in a text file for future re-insertion.

The next DIV it’s the Info one. Look around and try around so you can eliminate what you don’t need.
If you know php you can do wonders there. If not, play around but always pasting to some text document.