content: fix or remove broken links in Google I/O 2010 article

The original destination of these links seems to have vanished.
It doesn't really matter, so just remove them.  Leave a link to the
main Google I/O blog post, and to the video of the Go programming talk.

This particular blog article is not too interesting today but I guess
it's a reminder of the early days.

Change-Id: I8d90c84d9eb442ee4028a875d2df670f444be417
Reviewed-on: https://go-review.googlesource.com/c/blog/+/190717
Reviewed-by: Dmitri Shuralyov <dmitshur@golang.org>
Reviewed-by: Shulhan <m.shulhan@gmail.com>
diff --git a/content/upcoming-google-io-go-events.article b/content/upcoming-google-io-go-events.article
index 1641eca..30868bf 100644
--- a/content/upcoming-google-io-go-events.article
+++ b/content/upcoming-google-io-go-events.article
@@ -5,11 +5,11 @@
 
 * Introduction
 
-[[http://code.google.com/events/io/2010/][Google I/O 2010]] is happening next week at the Moscone Centre in San Francisco. Those of you with tickets will be able to catch some of the Go team both at I/O and at [[http://code.google.com/events/io/2010/bootcamp.html][Bootcamp]]. In reverse-chronological order:
+[[https://googleblog.blogspot.com/2010/01/google-io-2010-now-open-for.html][Google I/O 2010]] is happening next week at the Moscone Centre in San Francisco. Those of you with tickets will be able to catch some of the Go team both at I/O and at Bootcamp. In reverse-chronological order:
 
-Rob Pike and Russ Cox will be presenting a [[http://code.google.com/events/io/2010/sessions/go-programming.html][Go Programming]] talk on Thursday at 10.15am. This session takes a detailed look at how Go differs from other languages in a practical sense. Through a series of examples, they will demonstrate various features of Go and the ways in which they affect program design.
+Rob Pike and Russ Cox will be presenting a [[https://www.youtube.com/watch?v=jgVhBThJdXc][Go Programming]] talk on Thursday at 10.15am. This session takes a detailed look at how Go differs from other languages in a practical sense. Through a series of examples, they will demonstrate various features of Go and the ways in which they affect program design.
 
-Several members of the Go team will be at the Go cube during [[http://code.google.com/events/io/2010/officehours.html][Office Hours]] on Wednesday between 12pm and 2:30pm. Come by to have your Go questions answered by the experts.
+Several members of the Go team will be at the Go cube during Office Hours on Wednesday between 12pm and 2:30pm. Come by to have your Go questions answered by the experts.
 
 At Bootcamp on Tuesday at 4.15pm, Andrew Gerrand will be giving an introductory talk about Go. The session will give an overview of the problems that motivated us to build a new language, and the ways in which Go addresses those problems.