Fix ALL the pub tests.

utils/tests/pub/version_solver_test.dart

Index: utils/tests/pub/version_solver_test.dart
diff --git a/utils/tests/pub/version_solver_test.dart b/utils/tests/pub/version_solver_test.dart
index b5b30eda77dfccd6b8fc49ea44cbfd8b0b219d3d..a48355f7830d713c21b4a3a1f43a6c20d117d543 100644
--- a/utils/tests/pub/version_solver_test.dart
+++ b/utils/tests/pub/version_solver_test.dart
@@ -449,14 +449,6 @@ testResolve(description, packages, {lockfile, result, Matcher error}) {
     } else if (error != null) {
       expect(future, throwsA(error));
     }
-
-    // If we aren't expecting an error, print some debugging info if we get one.
-    if (error == null) {
-      future.catchError((ex) {
-        print(ex);
-        print(future.stackTrace);
-      });
-    }
   });
 }