Issue 45430. Remove debug output.

Bug: https://github.com/dart-lang/sdk/issues/45430
Change-Id: Ife36ccc6dd55909662e05b3a2ab837d832f7e1a5
Reviewed-on: https://dart-review.googlesource.com/c/sdk/+/215920
Reviewed-by: Keerti Parthasarathy <keertip@google.com>
Reviewed-by: Brian Wilkerson <brianwilkerson@google.com>
Commit-Queue: Konstantin Shcheglov <scheglov@google.com>

pkg/analyzer/lib/src/dart/analysis/results.dart

diff --git a/pkg/analyzer/lib/src/dart/analysis/results.dart b/pkg/analyzer/lib/src/dart/analysis/results.dart
index 9db2ec6..2753ded 100644
--- a/pkg/analyzer/lib/src/dart/analysis/results.dart
+++ b/pkg/analyzer/lib/src/dart/analysis/results.dart
@@ -194,13 +194,8 @@
       (r) => r.path == elementPath,
       orElse: () {
         var elementStr = element.getDisplayString(withNullability: true);
-        var buffer = StringBuffer();
-        buffer.write('Element (${element.runtimeType}) $elementStr');
-        buffer.writeln(' is not defined in this library.');
-        // TODO(scheglov) https://github.com/dart-lang/sdk/issues/45430
-        buffer.writeln('elementPath: $elementPath');
-        buffer.writeln('unitPaths: ${units.map((e) => e.path).toList()}');
-        throw ArgumentError('$buffer');
+        throw ArgumentError('Element (${element.runtimeType}) $elementStr is '
+            'not defined in this library.');
       },
     );