message: Fix tsc "unused variable" errors.
diff: @@ -8,7 +8,7 @@ import { TranspileState } from './TranspileState';
  import { ParseMode } from './Parser';
  import * as fileUrl from 'file-url';
  import { walk, InternalWalkMode, WalkOptions, WalkVisitor } from '../astUtils/visitors';
  -import { isCommentStatement, isEscapedCharCodeLiteralExpression, isLiteralExpression, isLiteralString, isStringType, isTemplateStringQuasiExpression, isVariableExpression } from '../astUtils/reflection';
  +import { isCommentStatement, isEscapedCharCodeLiteralExpression, isLiteralExpression, isStringType, isVariableExpression } from '../astUtils/reflection';
  import { BscType } from '../types/BscType';
  import { DynamicType } from '../types/DynamicType';
  import { VoidType } from '../types/VoidType';
  