refactor: remove contrast color overrides (#3411)

closes #2317

Author: sadaf895

src/styles/mdc_overwrites/mdc_overwrites.scss

@@ -6,41 +6,11 @@
  * more background: https://github.com/angular/components/issues/25981#issuecomment-1515332869
  */
 
-/* Text color for fab buttons otherwise defaults to black */
-.mat-mdc-fab.mat-accent,
-.mat-mdc-mini-fab.mat-accent {
-  --mat-fab-foreground-color: #{mat.m2-get-contrast-color-from-palette(
-      theme.$accent,
-      A200
-    )} !important;
-}
-
-/* Text color for buttons with accent color otherwise defaults to black */
-.mat-mdc-raised-button:not(:disabled)[color="accent"] {
-  --mdc-protected-button-label-text-color: #{mat.m2-get-contrast-color-from-palette(
-      theme.$accent,
-      A200
-    )} !important
-;
-}
-
 /* Progress bar background color should have opacity to indicate progress */
 .mat-mdc-progress-bar .mdc-linear-progress__buffer-bar {
   opacity: 25%;
 }
 
-/* Color for enabled checkbox otherwise defaults to black */
-.mdc-checkbox
-  .mdc-checkbox__native-control:enabled
-  ~ .mdc-checkbox__background
-  .mdc-checkbox__checkmark {
-  --mdc-checkbox-selected-checkmark-color: #{mat.m2-get-contrast-color-from-palette(
-      theme.$accent,
-      A200
-    )} !important
-;
-}
-
 /* Color for selected date range in date picker defaults to white */
 .mat-calendar-body-in-range::before {
   --mat-datepicker-calendar-date-in-range-state-background-color: #{color-mix(