Theme is visable in options, but shouldn't be

Summary

Due to anti finger printing, we don't allow the user to change the theme (its always purple, not dark or light). We have a setting to change the theme that doesn't do anything and should be removed.

Steps to reproduce:

Launch tor browser for android
Connect to tor
Tap on the ⋮ button in the bottom right, then navigate to > Settings > Customize and notice that there is a Theme option

What is the current bug behavior?

There is an option to set the theme to Light, Dark, or to follow the device theme (shown in screenshot below)

What is the expected behavior?

There should not be an option to set the theme, because we don't use it

Environment

Which operating system are you using? macOS Ventura 13.5.1, apple M2 Max, Pixel 7 pro API 34 (arm 64 emulator)

Which installation method did you use? Git