bug(scss): ng update @angular/cdk did not remove .scss extension imports which breaks the application after serving.

[iKrishnaSahu]

Is this a regression?

• Yes, this behavior used to work in the previous version

The previous version in which this bug was not present was

No response

Description

ng update @angular/cdk did not remove .scss extension imports which breaks the application after serving.

Before ng update @angular/cdk
@import '~@angular/material/_theming.scss';

After ng update @angular/cdk
@import '@angular/material/_theming.scss';

Reproduction

Steps to reproduce:

1. Have a style which imports material theming like this => @import '~@angular/material/_theming.scss';
2. Run ng update @angular/cdk or ng update @angular/core @angular/cli ​@angular/material ​@angular/cdk
3. Run npm start or ng serve

Expected Behavior

It should have removed .scss extension from the @import.

@import '@angular/material/_theming';

Actual Behavior

Error: Module build failed (from ./node_modules/sass-loader/dist/cjs.js):
SassError: Can't find stylesheet to import.
╷
21 │ @import '@angular/material/_theming.scss';
│ ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
╵
apps\custom\src\custom-theme.scss 21:9 @import

Environment

Angular CLI: 13.0.4
Node: 14.17.0
Package Manager: npm 6.14.13
OS: win32 x64

Angular: 13.1.1
... animations, cdk, common, compiler, compiler-cli, core, forms
... material, platform-browser, platform-browser-dynamic, router

@angular-devkit/architect 0.1300.4
@angular-devkit/build-angular 13.0.4
@angular-devkit/core 13.0.4
@angular-devkit/schematics 13.0.4
@angular/cli 13.0.4
@angular/flex-layout 13.0.0-beta.36
@angular/language-service 12.2.15
@schematics/angular 13.0.4
rxjs 7.5.1
typescript 4.4.4

• Browser(s): Chrome
• Operating System (e.g. Windows, macOS, Ubuntu): Windows

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