Remove several packages from DEPS

.packages

 # Copyright (c) 2016, the Dart project authors.  Please see the AUTHORS file
 # for details. All rights reserved. Use of this source code is governed by a
 # BSD-style license that can be found in the LICENSE file.
 #
 # .package file containing links to all packages in /pkg, and checked out
 # by DEPS into /third_party/pkg and /third_party/pkg_tested.
 # Please update this file if you add a package to DEPS or /pkg
 #
 analysis_server:pkg/analysis_server/lib
 analyzer:pkg/analyzer/lib
 analyzer_cli:pkg/analyzer_cli/lib
 analyzer_plugin:pkg/analyzer_plugin/lib
 args:third_party/pkg/args/lib
 async:third_party/pkg/async/lib
 async_helper:pkg/async_helper/lib
 barback:third_party/pkg/barback/lib
 bazel_worker:third_party/pkg/bazel_worker/lib
 boolean_selector:third_party/pkg/boolean_selector/lib
 browser:pkg/browser/lib
 charcode:third_party/pkg/charcode/lib
 charted:third_party/observatory_pub_packages/packages/charted/lib
 cli_util:third_party/pkg/cli_util/lib
-code_transformers:third_party/pkg/code_transformers/lib
 collection:third_party/pkg/collection/lib
 compiler:pkg/compiler/lib
 # Compiler is imported as compiler_unsupported so it can work outside the SDK.
 compiler_unsupported:pkg/compiler/lib
 convert:third_party/pkg/convert/lib
 crypto:third_party/pkg/crypto/lib
 csslib:third_party/pkg/csslib/lib
 dart2js_info:third_party/pkg/dart2js_info/lib
 dart_messages:pkg/dart_messages/lib
 dart_style:third_party/pkg_tested/dart_style/lib
 dartdoc:third_party/pkg/dartdoc/lib
 dev_compiler:pkg/dev_compiler/lib
 expect:pkg/expect/lib
 fasta:pkg/fasta/lib
 fixnum:third_party/pkg/fixnum/lib
 front_end:pkg/front_end/lib
 func:third_party/pkg/func/lib
 glob:third_party/pkg/glob/lib
 html:third_party/pkg/html/lib
 http:third_party/pkg/http/lib
 http_multi_server:third_party/pkg/http_multi_server/lib
 http_parser:third_party/pkg/http_parser/lib
 http_throttle:third_party/pkg/http_throttle/lib
-initialize:third_party/pkg/initialize/lib
 intl:third_party/pkg/intl/lib
 isolate:third_party/pkg/isolate/lib
 js:pkg/js/lib
 js_ast:pkg/js_ast/lib
 js_runtime:sdk/lib/_internal/js_runtime/lib
 json_rpc_2:third_party/pkg/json_rpc_2/lib
 kernel:pkg/kernel/lib
 linter:third_party/pkg/linter/lib
 logging:third_party/pkg/logging/lib
 lookup_map:pkg/lookup_map/lib
 markdown:third_party/pkg/markdown/lib
 matcher:third_party/pkg/matcher/lib
 meta:pkg/meta/lib
 metatest:third_party/pkg/metatest/lib
 microlytics:pkg/microlytics/lib
 mime:third_party/pkg/mime/lib
 mustache4dart:third_party/pkg/mustache4dart/lib
 oauth2:third_party/pkg/oauth2/lib
-observable:third_party/pkg/observable/lib
 observatory:runtime/observatory/lib
-observe:third_party/pkg/observe/lib
 package_config:third_party/pkg_tested/package_config/lib
 package_resolver:third_party/pkg_tested/package_resolver/lib
 path:third_party/pkg/path/lib
 petitparser:third_party/pkg/petitparser/lib
 plugin:third_party/pkg/plugin/lib
 pool:third_party/pkg/pool/lib
 protobuf:third_party/pkg/protobuf/lib
 pub:third_party/pkg/pub/lib
 pub_semver:third_party/pkg/pub_semver/lib
 quiver:third_party/pkg/quiver/lib
 quiver_hashcode:third_party/pkg/quiver_hashcode/lib
 resource:third_party/pkg/resource/lib
 scheduled_test:third_party/pkg/scheduled_test/lib
 sdk_library_metadata:sdk/lib/_internal/sdk_library_metadata/lib
 shelf:third_party/pkg/shelf/lib
 shelf_packages_handler:third_party/pkg/shelf_packages_handler/lib
 shelf_static:third_party/pkg/shelf_static/lib
 shelf_web_socket:third_party/pkg/shelf_web_socket/lib
-smoke:third_party/pkg/smoke/lib
 source_map_stack_trace:third_party/pkg/source_map_stack_trace/lib
 source_maps:third_party/pkg/source_maps/lib
 source_span:third_party/pkg/source_span/lib
 stack_trace:third_party/pkg/stack_trace/lib
 stream_channel:third_party/pkg/stream_channel/lib
 string_scanner:third_party/pkg/string_scanner/lib
 telemetry:pkg/telemetry/lib
 test:third_party/pkg/test/lib
 test_dart:tools/testing/dart
 testing:pkg/testing/lib
 test_reflective_loader:third_party/pkg/test_reflective_loader/lib
 tuple:third_party/pkg/tuple/lib
 typed_data:third_party/pkg/typed_data/lib
 typed_mock:pkg/typed_mock/lib
 unittest:third_party/pkg/unittest/lib
 usage:third_party/pkg/usage/lib
 utf:third_party/pkg/utf/lib
 watcher:third_party/pkg/watcher/lib
-web_components:third_party/pkg/web_components/lib
 web_socket_channel:third_party/pkg/web_socket_channel/lib
 yaml:third_party/pkg/yaml/lib