Unused variables in initial-variables.scss

[theHacker]

This is about Bulma.
It seems to be a bug.

Overview of the problem

This is a Sass issue: I'm using version [1.0.1]
I am sure this issue is not a duplicate.

Description

I was looking in the Sass sources what can be configured, and I stumbled on $speed.
Curious what this is controlling, I searched for usages. But there are none.

It seems like some values in themes/light.scss are hard-coded instead of using their values from initial-variables.scss.
Comparing themes/light.scss

      // Other
      "block-spacing": iv.$block-spacing,
      "duration": 294ms,
      "easing": ease-out,
      "radius-small": iv.$radius-small,
      "radius": iv.$radius,
      "radius-medium": iv.$radius-medium,
      "radius-large": iv.$radius-large,
      "radius-rounded": 9999px,
      "speed": 86ms,

with
initial-variables.scss

// Miscellaneous

$easing: ease-out !default;
$radius-small: 0.25rem !default;
$radius: 0.375rem !default;
$radius-medium: 0.5em !default;
$radius-large: 0.75rem !default;
$radius-rounded: 9999px !default;
$speed: 86ms !default;

one notices, $easing, $radius-rounded and $speed are not used.