Revert "spec: skip Process wait specs on MJIT"

This reverts r63731 (commit 359dd59db2).

git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@63760 b2dd03c8-39d4-4d8f-98ff-823fe69b080e

spec/mspec/lib/mspec/guards/feature.rb

@@ -39,9 +39,3 @@ end
 def with_feature(*features, &block)
   FeatureGuard.new(*features).run_if(:with_feature, &block)
 end
-
-MSpecEnv.class_eval do
-  def without_feature(*features, &block)
-    FeatureGuard.new(*features).run_unless(:without_feature, &block)
-  end
-end

spec/ruby/core/process/wait2_spec.rb

@@ -14,7 +14,6 @@ describe "Process.wait2" do
     end
   end
 
-  without_feature :mjit do # [Bug #14867]
   platform_is_not :windows do
     it "returns the pid and status of child process" do
       pidf = Process.fork { Process.exit! 99 }
@@ -31,4 +30,3 @@ describe "Process.wait2" do
     lambda { Process.wait2 }.should raise_error(StandardError)
   end
 end
-end

spec/ruby/core/process/wait_spec.rb

@@ -12,7 +12,6 @@ describe "Process.wait" do
     end
   end
 
-  without_feature :mjit do # [Bug #14867]
   it "raises an Errno::ECHILD if there are no child processes" do
     lambda { Process.wait }.should raise_error(Errno::ECHILD)
   end
@@ -89,4 +88,3 @@ describe "Process.wait" do
     end
   end
 end
-end

spec/ruby/core/process/waitall_spec.rb

@@ -8,7 +8,6 @@ describe "Process.waitall" do
     end
   end
 
-  without_feature :mjit do # [Bug #14867]
   it "returns an empty array when there are no children" do
     Process.waitall.should == []
   end
@@ -47,4 +46,3 @@ describe "Process.waitall" do
     end
   end
 end
-end