Delete a bunch of packages that are now on GitHub.

pkg/string_scanner/CHANGELOG.md

Index: pkg/string_scanner/CHANGELOG.md
diff --git a/pkg/string_scanner/CHANGELOG.md b/pkg/string_scanner/CHANGELOG.md
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-## 0.1.3
-
-* Add an optional `endState` argument to `SpanScanner.spanFrom`.
-
-## 0.1.2
-
-* Add `StringScanner.substring`, which returns a substring of the source string.
-
-## 0.1.1
-
-* Declare `SpanScanner`'s exposed `SourceSpan`s and `SourceLocation`s to be
-  `FileSpan`s and `FileLocation`s. They always were underneath, but callers may
-  now rely on it.
-
-* Add `SpanScanner.location`, which returns the scanner's current
-  `SourceLocation`.
-
-## 0.1.0
-
-* Switch from `source_maps`' `Span` class to `source_span`'s `SourceSpan` class.
-
-* `new StringScanner()`'s `sourceUrl` parameter is now named to make it clear
-  that it can be safely `null`.
-
-* `new StringScannerException()` takes different arguments in a different order
-  to match `SpanFormatException`.
-
-* `StringScannerException.string` has been renamed to
-  `StringScannerException.source` to match the `FormatException` interface.
-
-## 0.0.3
-
-* Make `StringScannerException` inherit from source_map's
-  [`SpanFormatException`][].
-
-[SpanFormatException]: (http://www.dartdocs.org/documentation/source_maps/0.9.2/index.html#source_maps/source_maps.SpanFormatException)
-
-## 0.0.2
-
-* `new StringScanner()` now takes an optional `sourceUrl` argument that provides
-  the URL of the source file. This is used for error reporting.
-
-* Add `StringScanner.readChar()` and `StringScanner.peekChar()` methods for
-  doing character-by-character scanning.
-
-* Scanners now throw `StringScannerException`s which provide more detailed
-  access to information about the errors that were thrown and can provide
-  terminal-colored messages.
-
-* Add a `LineScanner` subclass of `StringScanner` that automatically tracks line
-  and column information of the text being scanned.
-
-* Add a `SpanScanner` subclass of `LineScanner` that exposes matched ranges as
-  [source map][] `Span` objects.
-
-[source_map]: http://pub.dartlang.org/packages/source_maps