LG-3878 remove BassCSS typography

[solipet]

Why: As a user, I expect that login.gov has a consistent visual style, and that my page load times are not prolonged by loading redundant CSS. As a developer, I expect that existing references to BassCSS module classes are replaced with equivalent USWDS or ad hoc alternatives, so that we can successfully migrate away from and eliminate our dependency on BassCSS.

Styles being removed:

• https://github.com/basscss/basscss-sass/blob/v3.0.0/_type-scale.scss
• https://github.com/basscss/basscss-sass/blob/v3.0.0/_utility-typography.scss

All of the variables defined in the type-scale module of BassCSS were already in the idp stylesheets or unused. We can simply delete the inclusion of the BassCSS type-scale module.

The utility-typography classes map to the uswds classes as follows:

BassCSS	USWDS
bold	text-bold
regular	text-normal
left-align	text-left
center	text-center
right-align	text-right
justify	text-justify
nowrap	text-nowrap

The BassCSS class list-reset was mapped to usa-list--unstyled with no noticeable difference in layout:

list-reset	usa-list--unstyled
list-style: none;	list-style-type:none;
padding-left: 0;	padding-left:0;
	margin-bottom:0;
	margin-top:0;

The following two classes that didn't have a clear replacement and have been copied into the design-system-waiting-room:

.break-word { word-wrap: break-word }

.truncate {
  max-width: 100%;
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}

[aduth]

This file isn't currently being imported anywhere.

[solipet]

Ah, it's created in #5944 - I'll be sure to wait for that to merge then resolve conflicts before merging mine.

[aduth]

Can we consolidate overlapping patterns on line 22-24?

[solipet]

Yup! 39d66bed0

[aduth]

LGTM 👍