How to remove the underscore line while editing?

[MassD]

Hi.

I begin to use yoru suite. It is very nice.

However, could you please tell me how to remove the long underscore line which indicates the current edit position?

the line looks like this:

[oracleyue]

try this, it works for me
(set-face-attribute hl-line-face nil :underline nil)
Since by default the line hightlight color is the same as the background color, you won't see the highlight. Try to change the bg color of highlight, if you like, by
(set-face-background 'hl-line "grey27")
Here is a snaphot of what my line hightlight looks like