dev-ruby/concurrent-ruby: remove unused patch.

dev-ruby/concurrent-ruby/files/concurrent-ruby-1.0.2-alpha.patch

@@ -1,50 +0,0 @@
-commit af059a7ac7815d1edac67b21e5c1bd6b805d4493
-Author: Hans de Graaff <hans@degraaff.org>
-Date:   Mon Jul 4 20:09:25 2016 +0200
-
-    Support Alpha architecture for processor_count
-    
-    Alpha machines with Linux do have /proc/cpuinfo but its format is
-    different from normal Linux machines, and most specifically the
-    processor entry is missing. Moreover, Alpha machines can be configured
-    to compartimentalize their CPUs into different machines leading to
-    further confusion when reading /proc/cpuinfo.
-    
-    Using /usr/bin/nproc seems to be the most reliable method of determining
-    the number of processors on Alpha. Since reading /proc/cpuinfo is not
-    reliable this patch places the nproc method before trying /proc/cpuinfo.
-    
-    For futher reference see our downstream bug report at
-    https://bugs.gentoo.org/show_bug.cgi?id=587986
-
-diff --git a/CHANGELOG.md b/CHANGELOG.md
-index e84c683..18dd8cc 100644
---- a/CHANGELOG.md
-+++ b/CHANGELOG.md
-@@ -1,3 +1,5 @@
-+* Support Alpha with `Concurrent::processor_count`
-+
- ## Current Release v1.0.2 (2 May 2016)
- 
- * Fix bug with `Concurrent::Map` MRI backend `#inspect` method
-diff --git a/lib/concurrent/utility/processor_counter.rb b/lib/concurrent/utility/processor_counter.rb
-index d18b0bb..e82c0a6 100644
---- a/lib/concurrent/utility/processor_counter.rb
-+++ b/lib/concurrent/utility/processor_counter.rb
-@@ -28,6 +28,7 @@ module Concurrent
-       # processor", which taked into account hyperthreading.
-       #
-       # * AIX: /usr/sbin/pmcycles (AIX 5+), /usr/sbin/lsdev
-+      # * Alpha: /usr/bin/nproc (/proc/cpuinfo exists but cannot be used)
-       # * BSD: /sbin/sysctl
-       # * Cygwin: /proc/cpuinfo
-       # * Darwin: /usr/bin/hwprefs, /usr/sbin/sysctl
-@@ -84,6 +85,8 @@ module Concurrent
-             result = WIN32OLE.connect("winmgmts://").ExecQuery(
-               "select NumberOfLogicalProcessors from Win32_Processor")
-             result.to_enum.collect(&:NumberOfLogicalProcessors).reduce(:+)
-+          elsif File.executable?("/usr/bin/nproc")
-+            IO.popen("/usr/bin/nproc --all").read.to_i
-           elsif File.readable?("/proc/cpuinfo")
-             IO.read("/proc/cpuinfo").scan(/^processor/).size
-           elsif File.executable?("/usr/bin/hwprefs")