[rubygems/rubygems] Remove all `syck` traces from `rubygems`

After reading [this blog
post](https://blog.rubygems.org/2011/08/31/shaving-the-yaml-yak.html),
published almost 10 years ago already, my understanding is that this
problem could come up in two ways:

* Rubygems.org serving corrupted gemspecs". As far as I understand this
was fixed in rubygems.org a lot time ago, since
https://github.com/rubygems/rubygems.org/pull/331.

* Clients having a ten years old gemspec cache with some of these bad
gemspecs. In this case, there's no easy solution but I think ten years
is enough and rebuilding the cache should do the trick.

So, I think it's time we remove this.

https://github.com/rubygems/rubygems/commit/afcb15d556

1 files changed, 0 insertions, 6 deletions

diff --git a/lib/rubygems/specification.rb b/lib/rubygems/specification.rb
index 14226796f1..ff345bf7a3 100644
--- a/lib/rubygems/specification.rb
+++ b/lib/rubygems/specification.rb
@@ -1690,12 +1690,6 @@ class Gem::Specification < Gem::BasicSpecification
             when String then
               if DateTimeFormat =~ date
                 Time.utc($1.to_i, $2.to_i, $3.to_i)
-
-              # Workaround for where the date format output from psych isn't
-              # parsed as a Time object by syck and thus comes through as a
-              # string.
-              elsif /\A(\d{4})-(\d{2})-(\d{2}) \d{2}:\d{2}:\d{2}\.\d+?Z\z/ =~ date
-                Time.utc($1.to_i, $2.to_i, $3.to_i)
               else
                 raise(Gem::InvalidSpecificationException,
                       "invalid date format in specification: #{date.inspect}")