How do I hide vertical code folding lines in IntelliJ?

It is as the title says.

How can I hide these vertical, white code-folding lines?

I know I can hide the outline lines by going to Editor -> General -> Code Folding and unchecking the "Show code folding outline" box. However, I'm fine with these lines. The code folding lines like under void, however, are quite annoying.

If possible, I would appreciate a solution without changing the color of the code-folding lines, but if that is the only method, then please tell me how to do so. Thanks!

Specs:

IntelliJ IDEA 2017.2.5
Build #IU-172.4343.14, built on September 26, 2017
JRE: 1.8.0_152-release-915-b12 x86_64
JVM: OpenJDK 64-Bit Server VM by JetBrains s.r.o
Mac OS X 10.11.6