Remove dead links (#672)

README.md

@@ -12,24 +12,17 @@ If you enjoy the papers, perhaps stop by a local chapter meetup and join in on t
 
 Here are our official chapters. Let us know if you are interested in [starting one](https://github.com/papers-we-love/organizers) in your city!
 
-* [Amsterdam](http://www.meetup.com/papers-we-love-amsterdam/)
 * [Athens](https://www.meetup.com/Papers-We-Love-Athens)
 * [Atlanta](https://www.meetup.com/Papers-We-Love-Atlanta)
 * [Bangalore](http://www.meetup.com/Papers-we-love-Bangalore/)
-* [Barcelona](https://www.meetup.com/papers-we-love-bcn/)
-* [Belfast](http://www.meetup.com/Papers-We-Love-Belfast/)
 * [Berlin](http://www.meetup.com/Papers-We-Love-Berlin/)
 * [Bhubaneswar](https://www.facebook.com/groups/pwlbbsr/)
 * [Boston](http://www.meetup.com/Papers-We-Love-Boston-Cambridge/)
-* [Brasilia](http://www.meetup.com/papers-we-love-bsb)
 * [Bucharest](http://www.meetup.com/papers-we-love-bucharest/)
 * [Buenos Aires](https://paperswelove.org/buenos-aires/)
-* [Cairo](http://www.meetup.com/Papers-We-Love-Cairo/)
 * [Chattanooga](http://www.meetup.com/Papers-We-Love-Chattanooga/)
 * [Chicago](http://www.meetup.com/papers-we-love-chicago/)
 * [Columbus, Ohio](http://www.meetup.com/Papers-We-Love-Columbus/)
-* [Gothenburg](https://www.meetup.com/Papers-We-Love-Gothenburg/)
-* [Hamburg](http://www.meetup.com/Papers-We-Love-Hamburg/)
 * [Hyderabad](http://www.meetup.com/papers-we-love-hyderabad/)
 * [Iowa City](https://www.meetup.com/techcorridorio)
 * [Kathmandu](https://www.facebook.com/groups/PapersWeLoveKathmandu/)
@@ -37,19 +30,16 @@ Here are our official chapters. Let us know if you are interested in [starting o
 * [Lebanon](http://www.paperswelovelb.club)
 * [London](http://www.meetup.com/papers-we-love-london)
 * [Los Angeles](http://www.meetup.com/papers-we-love-la)
-* [Madrid](http://www.meetup.com/Papers-We-Love-Madrid/)
 * [Montreal](http://www.meetup.com/Papers-We-Love-Montreal/)
 * [New York City](http://www.meetup.com/papers-we-love/)
 * [Paris](http://www.meetup.com/Papers-We-Love-Paris/)
 * [Pune](http://www.meetup.com/Doo-Things)
 * [Raleigh-Durham](https://www.meetup.com/Papers-We-Love-Raleigh-Durham/)
-* [Rio de Janeiro](https://www.meetup.com/pt-BR/papers-we-love-rio-de-janeiro/)
 * [San Diego](http://www.meetup.com/Papers-We-Love-San-Diego/)
 * [San Francisco](http://www.meetup.com/papers-we-love-too/)
 * [Seattle](http://www.meetup.com/Papers-We-Love-Seattle/)
 * [Seoul, Korea](http://www.meetup.com/seoul-tech-society)
 * [Singapore](https://www.facebook.com/groups/paperswelovesg/)
-* [St. Louis](http://www.meetup.com/Papers-We-Love-in-saint-louis/)
 * [Teresina](https://www.meetup.com/pt-BR/Papers-We-Love-Teresina/)
 * [Toronto](http://www.meetup.com/Papers-We-Love-Toronto/)
 * [Vienna](http://www.meetup.com/Papers-We-Love-Vienna/)

languages/erlang/README.md

@@ -3,8 +3,6 @@
 * [Making reliable distributed systems in the presence of software errors](http://erlang.org/download/armstrong_thesis_2003.pdf)
 PhD thesis of Joe Armstrong, Erlang’s co-inventor, describing the origins of Erlang.
 
-* [A History of Erlang](http://webcem01.cem.itesm.mx:8005/erlang/cd/downloads/hopl_erlang.pdf) by Joe Armstrong
-
 * [Characterizing the Scalability of Erlang VM on Many-core Processors](http://www.diva-portal.org/smash/get/diva2:392243/FULLTEXT01.pdfOn) by Jianrong Zhang
 
 * [On the Scalability of the Erlang Term Storage](http://winsh.me/papers/erlang_workshop_2013.pdf) by David Klaftenegger, Konstantinos Sagonas, Kjell Winblad