Remove the ability in dart2js to turn off syntax-only generic methods.

Remove the ability in dart2js to turn off syntax-only generic methods.

This CL removes all the checks for 'enableGenericMethodSyntax' in the
implementation, which takes away the ability to turn this feature off
and simplifies the code.

As a result, `ParserOptions` is now empty; we may want to remove it,
but this CL does not do that.

R=sigmund@google.com

Committed: https://github.com/dart-lang/sdk/commit/7809d25b923193ec24ca1561d4958cfa2aa41971

[eernst, 2016-11-22 18:23:34]

eernst@google.com changed reviewers:
+ johnniwinther@google.com

[eernst, 2016-11-22 18:23:35]

Remove checks for syntax-only generic methods support, as a clean up action now
that the option is ignored and the feature is always on anyway.

[Siggi Cherem (dart-lang), 2016-11-22 18:49:18]

sigmund@google.com changed reviewers:
+ sigmund@google.com

[Siggi Cherem (dart-lang), 2016-11-22 18:49:18]

Thanks Erik! lgtm! Feel free to delete ParserOptions together with this CL if
you like :)

[eernst, 2016-11-23 11:16:54]

Description was changed from

==========
Remove the ability in dart2js to turn off syntax-only generic methods.

This CL removes all the checks for 'enableGenericMethodSyntax' in the
implementation, which takes away the ability to turn this feature off
and simplifies the code.

As a result, `ParserOptions` is now empty; we may want to remove it,
but this CL does not do that.
==========

to

==========
Remove the ability in dart2js to turn off syntax-only generic methods.

This CL removes all the checks for 'enableGenericMethodSyntax' in the
implementation, which takes away the ability to turn this feature off
and simplifies the code.

As a result, `ParserOptions` is now empty; we may want to remove it,
but this CL does not do that.

R=sigmund@google.com

Committed:
https://github.com/dart-lang/sdk/commit/7809d25b923193ec24ca1561d4958cfa2aa41971
==========

[eernst, 2016-11-23 11:16:55]

Committed patchset #2 (id:20001) manually as
7809d25b923193ec24ca1561d4958cfa2aa41971 (presubmit successful).

[eernst, 2016-11-23 11:17:02]

Very good! Eliminated `ParserOptions`; now landing.

[Siggi Cherem (dart-lang), 2016-11-23 14:52:15]

Thank you so much Erik! :)
lgtm++