Fix: disable crystal-lang/crystal#14558 patch

It seems to be creating parallelism issues with the GC instead of fixing
them.

src/core_ext/thread.cr

@@ -28,40 +28,40 @@ class Thread
   # the following methods apply these patches:
   # https://github.com/crystal-lang/crystal/pull/14558
 
-  def initialize(@name : String? = nil, &@func : Thread ->)
-    @system_handle = uninitialized Crystal::System::Thread::Handle
-    init_handle
-
-    Thread.threads.push(self) # <= moved here
-  end
-
-  protected def start
-    Thread.current = self
-    @current_fiber = @main_fiber = fiber = Fiber.new(stack_address, self)
-
-    if name = @name
-      self.system_name = name
-    end
-
-    begin
-      @func.call(self)
-    rescue ex
-      @exception = ex
-    ensure
-      {% if flag?(:preview_mt) %}
-        # fix the thread stack now so we can start cleaning up references
-        GC.lock_read
-        GC.set_stackbottom(self.gc_thread_handler, fiber.@stack_bottom)
-        GC.unlock_read
-      {% else %}
-        GC.set_stackbottom(fiber.@stack_bottom)
-      {% end %}
-
-      Thread.threads.delete(self)
-      Fiber.inactive(fiber)
-      detach { system_close }
-    end
-  end
+  # def initialize(@name : String? = nil, &@func : Thread ->)
+  #   @system_handle = uninitialized Crystal::System::Thread::Handle
+  #   init_handle
+
+  #   Thread.threads.push(self) # <= moved here
+  # end
+
+  # protected def start
+  #   Thread.current = self
+  #   @current_fiber = @main_fiber = fiber = Fiber.new(stack_address, self)
+
+  #   if name = @name
+  #     self.system_name = name
+  #   end
+
+  #   begin
+  #     @func.call(self)
+  #   rescue ex
+  #     @exception = ex
+  #   ensure
+  #     {% if flag?(:preview_mt) %}
+  #       # fix the thread stack now so we can start cleaning up references
+  #       GC.lock_read
+  #       GC.set_stackbottom(self.gc_thread_handler, fiber.@stack_bottom)
+  #       GC.unlock_read
+  #     {% else %}
+  #       GC.set_stackbottom(fiber.@stack_bottom)
+  #     {% end %}
+
+  #     Thread.threads.delete(self)
+  #     Fiber.inactive(fiber)
+  #     detach { system_close }
+  #   end
+  # end
 
   def scheduler : Crystal::Scheduler
     raise "BUG: deprecated call to Thread#scheduler"