openssl: remove impossible EOFError raise in OpenSSL::Buffering

* ext/openssl/lib/openssl/buffering.rb (read_nonblock, readpartial):
  Remove impossible EOFError raise. Patch by Zach Anker
  <zanker@squareup.com>.  [GH ruby/openssl#23]

git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@55097 b2dd03c8-39d4-4d8f-98ff-823fe69b080e

ChangeLog

@@ -1,3 +1,9 @@
+Sat May 21 12:40:36 2016  Kazuki Yamaguchi  <k@rhe.jp>
+
+	* ext/openssl/lib/openssl/buffering.rb (read_nonblock, readpartial):
+	  Remove impossible EOFError raise. Patch by Zach Anker
+	  <zanker@squareup.com>.  [GH ruby/openssl#23]
+
 Sat May 21 11:18:42 2016  Evgeni Golov  <evgeni@golov.de>
 
 	* lib/ipaddr.rb: [DOC] fix documentation of IN6MASK to mention

ext/openssl/lib/openssl/buffering.rb

@@ -132,7 +132,6 @@ module OpenSSL::Buffering
       buf.replace(ret)
       ret = buf
     end
-    raise EOFError if ret.empty?
     ret
   end
 
@@ -182,7 +181,6 @@ module OpenSSL::Buffering
       buf.replace(ret)
       ret = buf
     end
-    raise EOFError if ret.empty?
     ret
   end