Fixed and removed invalid Thread specs.

A Thread can be in exactly three states via the methods that are available:
running, sleeping, and dead. Every other supposed state is a race condition
because there is no API to put the thread deterministically (ie, not as a
factor of some random scheduling artifact) into that state.

spec/ruby/core/thread/inspect_spec.rb

@@ -30,19 +30,7 @@
     ThreadSpecs.status_of_thread_with_uncaught_exception.inspect.should include('dead')
   end
 
-  ruby_version_is ""..."1.9" do
-    it "describes a dying running thread" do
-      ThreadSpecs.status_of_dying_running_thread.inspect.should include('aborting')
-    end
-  end
-
   it "describes a dying sleeping thread" do
     ThreadSpecs.status_of_dying_sleeping_thread.status.should include('sleep')
   end
-
-  quarantine! do
-  it "reports aborting on a killed thread" do
-    ThreadSpecs.status_of_aborting_thread.inspect.should include('aborting')
-  end
-  end
 end

spec/ruby/core/thread/status_spec.rb

@@ -30,19 +30,7 @@
     ThreadSpecs.status_of_thread_with_uncaught_exception.status.should == nil
   end
 
-  ruby_version_is ""..."1.9" do
-    it "describes a dying running thread" do
-      ThreadSpecs.status_of_dying_running_thread.status.should == 'aborting'
-    end
-  end
-
   it "describes a dying sleeping thread" do
     ThreadSpecs.status_of_dying_sleeping_thread.status.should == 'sleep'
   end
-
-  quarantine! do
-  it "reports aborting on a killed thread" do
-    ThreadSpecs.status_of_aborting_thread.status.should == 'aborting'
-  end
-  end
 end

spec/ruby/optional/capi/thread_spec.rb

@@ -131,7 +131,7 @@ def call_capi_rb_thread_wakeup
     thr.wakeup
 
     # Make sure it stopped
-    thr.join(1).should_not be_nil
+    thr.join.should_not be_nil
 
     # And we got a proper value
     thr.value.should be_true