ci: fix lint issue (#29368)

(cherry picked from commit 6659d8f)

Author: mmalerba

src/material/core/tokens/tests/test-validate-tokens.scss

@@ -40,7 +40,6 @@
 @use '../m2/mdc/tab-indicator' as tokens-mdc-tab-indicator;
 @use '../m2/mdc/snack-bar' as tokens-mdc-snack-bar;
 @use '../m2/mdc/slider' as tokens-mdc-slider;
-@use '../m2/mdc/chip' as tokens-mdc-chip;
 @use '../m2/mdc/dialog' as tokens-mdc-dialog;
 @use '../m2/mdc/filled-text-field' as tokens-mdc-filled-text-field;
 @use '../m2/mdc/outlined-text-field' as tokens-mdc-outlined-text-field;