Delete a bunch of packages that are now on GitHub.

pkg/yaml/CHANGELOG.md

Index: pkg/yaml/CHANGELOG.md
diff --git a/pkg/yaml/CHANGELOG.md b/pkg/yaml/CHANGELOG.md
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-## 2.1.2
-
-* Fix a crashing bug when parsing block scalars.
-
-## 2.1.1
-
-* Properly scope `SourceSpan`s for scalar values surrounded by whitespace.
-
-## 2.1.0
-
-* Rewrite the parser for a 10x speed improvement.
-
-* Support anchors and aliases (`&foo` and `*foo`).
-
-* Support explicit tags (e.g. `!!str`). Note that user-defined tags are still
-  not fully supported.
-
-* `%YAML` and `%TAG` directives are now parsed, although again user-defined tags
-  are not fully supported.
-
-* `YamlScalar`, `YamlList`, and `YamlMap` now expose the styles in which they
-  were written (for example plain vs folded, block vs flow).
-
-* A `yamlWarningCallback` field is exposed. This field can be used to customize
-  how YAML warnings are displayed.
-
-## 2.0.1+1
-
-* Fix an import in a test.
-
-* Widen the version constraint on the `collection` package.
-
-## 2.0.1
-
-* Fix a few lingering references to the old `Span` class in documentation and
-  tests.
-
-## 2.0.0
-
-* Switch from `source_maps`' `Span` class to `source_span`'s `SourceSpan` class.
-
-* For consistency with `source_span` and `string_scanner`, all `sourceName`
-  parameters have been renamed to `sourceUrl`. They now accept Urls as well as
-  Strings.
-
-## 1.1.1
-
-* Fix broken type arguments that caused breakage on dart2js.
-
-* Fix an analyzer warning in `yaml_node_wrapper.dart`.
-
-## 1.1.0
-
-* Add new publicly-accessible constructors for `YamlNode` subclasses. These
-  constructors make it possible to use the same API to access non-YAML data as
-  YAML data.
-
-* Make `YamlException` inherit from source_map's [`SpanFormatException`][]. This
-  improves the error formatting and allows callers access to source range
-  information.
-
-[SpanFormatException]: (http://www.dartdocs.org/documentation/source_maps/0.9.2/index.html#source_maps/source_maps.SpanFormatException)
-
-## 1.0.0+1
-
-* Fix a variable name typo.
-
-## 1.0.0
-
-* **Backwards incompatibility**: The data structures returned by `loadYaml` and
-  `loadYamlStream` are now immutable.
-
-* **Backwards incompatibility**: The interface of the `YamlMap` class has
-  changed substantially in numerous ways. External users may no longer construct
-  their own instances.
-
-* Maps and lists returned by `loadYaml` and `loadYamlStream` now contain
-  information about their source locations.
-
-* A new `loadYamlNode` function returns the source location of top-level scalars
-  as well.
-
-## 0.10.0
-
-* Improve error messages when a file fails to parse.
-
-## 0.9.0+2
-
-* Ensure that maps are order-independent when used as map keys.
-
-## 0.9.0+1
-
-* The `YamlMap` class is deprecated. In a future version, maps returned by
-  `loadYaml` and `loadYamlStream` will be Dart `HashMap`s with a custom equality
-  operation.