Remove workaround for missing abstract keyword for ClassTypeAliases (dartbug.com/15912).

pkg/analyzer/test/services/data/stmt_tests.data

 >>>
 if (x &&
     y) {
   print('!');
 }
 <<<
 if (x && y) {
   print('!');
 }
 >>>
@@ skipping 15 matching lines @@
   print(a);
 }
 >>>
 for (x in xs) {
   print(x);
 }
 <<<
 for (x in xs) {
   print(x);
 }
->>> TODO(pquitslund): FIX
+>>>
 var primes = [2, 3, 5, 7, 11, 13, 17, 19, 23, 29, 31, 37, 41, 43, 47, 53, 59, 61, 67, 71];
 <<<
 var primes = [2, 3, 5, 7, 11, 13, 17, 19, 23, 29, 31, 37, 41, 43, 47, 53, 59,
     61, 67, 71];
->>> TODO(pquitslund): placeholder for when we turn the real line breaker on
+>>>
 blah() {
   print('blah blah blah blah blah blah blah blah blah blah blah blah blah blah $foo');
 }
 <<<<
 blah() {
   print('blah blah blah blah blah blah blah blah blah blah blah blah blah blah $foo');
 }