Revert "Add DevTools memory test"

[zanderso]

Reverts #55486

Failing on the bots:

devtools stderr: FormatException: Could not find an option named "vm-uri".
devtools stderr: #0      Parser.validate (package:args/src/parser.dart:290:21)
devtools stderr: #1      Parser.parseLongOption (package:args/src/parser.dart:279:7)
devtools stderr: #2      Parser.parse (package:args/src/parser.dart:88:11)
devtools stderr: #3      ArgParser.parse (package:args/src/arg_parser.dart:326:42)
devtools stderr: #4      serveDevToolsWithArgs (package:devtools_server/src/server.dart:89:26)
devtools stderr: <asynchronous suspension>
devtools stderr: #5      main (file:///home/flutter/.pub-cache/hosted/pub.dartlang.org/devtools-0.1.15/bin/devtools.dart:9:3)
devtools stderr: <asynchronous suspension>
devtools stderr: #6      _startIsolate.<anonymous closure> (dart:isolate-patch/isolate_patch.dart:303:32)
devtools stderr: #7      _RawReceivePortImpl._handleMessage (dart:isolate-patch/isolate_patch.dart:172:12)

and later:

Task failed: FileSystemException: Cannot open file, path = '/home/flutter/.cocoon/flutter/dev/benchmarks/complex_layout/devtools_memory.json' (OS Error: No such file or directory, errno = 2)
Stack trace:
dart:io                                                    _File.readAsStringSync
package:flutter_devicelab/tasks/perf_tests.dart 732:42     DevToolsMemoryTest.run.<fn>
===== asynchronous gap ===========================
dart:async                                                 _asyncErrorWrapperHelper
package:flutter_devicelab/framework/framework.dart         _TaskRunner._performTask.<fn>
package:stack_trace                                        Chain.capture
package:flutter_devicelab/framework/framework.dart 169:11  _TaskRunner._performTask
package:flutter_devicelab/framework/framework.dart 101:41  _TaskRunner.run

and:

Task failed: Bad state: Future already completed
Stack trace:
 dart:async                                                 _AsyncCompleter.complete
package:flutter_devicelab/tasks/perf_tests.dart 776:40     DevToolsMemoryTest._launchApp.<fn>
===== asynchronous gap ===========================
dart:async                                                 _BoundSinkStream.listen
package:flutter_devicelab/tasks/perf_tests.dart 769:10     DevToolsMemoryTest._launchApp
===== asynchronous gap ===========================
dart:async                                                 _asyncThenWrapperHelper
package:flutter_devicelab/tasks/perf_tests.dart 708:13     DevToolsMemoryTest.run.<fn>
===== asynchronous gap ===========================
dart:async                                                 _asyncThenWrapperHelper
package:flutter_devicelab/tasks/perf_tests.dart            DevToolsMemoryTest.run.<fn>
package:flutter_devicelab/framework/utils.dart 460:24      inDirectory
package:flutter_devicelab/tasks/perf_tests.dart 703:12     DevToolsMemoryTest.run
package:flutter_devicelab/framework/framework.dart 170:36  _TaskRunner._performTask.<fn>
package:stack_trace                                        Chain.capture
package:flutter_devicelab/framework/framework.dart 169:11  _TaskRunner._performTask
package:flutter_devicelab/framework/framework.dart 101:41  _TaskRunner.run

[fluttergithubbot]

It looks like this pull request may not have tests. Please make sure to add tests before merging. If you need an exemption to this rule, contact Hixie on the #hackers channel in Chat.

Reviewers: Read the Tree Hygiene page and make sure this patch meets those guidelines before LGTMing.

[zanderso]

TBR

[dnfield]

LGTM