angular upgrade: remove TODO related to ng material migration

src/styles/partials/_forms.scss

@@ -70,13 +70,6 @@ textarea {
 }
 
 // radio input structure
-// /* TODO(mdc-migration): The following rule targets internal classes of checkbox that may no longer apply for the MDC version.*/
-// .mat-checkbox-label,
-// .mat-checkbox-layout .mat-checkbox-label {
-// 	max-width: 90vw;
-// 	overflow-x: auto;
-// 	@extend .clickable;
-// }
 button,
 .button {
 	font-family: 'Helvetica';
@@ -197,11 +190,6 @@ textarea {
 	padding: 1em;
 }
 
-/* TODO(mdc-migration): The following rule targets internal classes of checkbox that may no longer apply for the MDC version.*/
-mat-checkbox {
-	display: block;
-}
-
 .cdk-drag {
 	cursor: pointer;