Remove DSL version comments, note fork_worker as experimental

lib/puma/dsl.rb

@@ -654,8 +654,6 @@ def state_path(path)
     # @example
     #   state_permission 0600
     #
-    # @version 5.0.0
-    #
     def state_permission(permission)
       @options[:state_permission] = permission
     end
@@ -851,8 +849,6 @@ def on_stopped(&block)
     #     3.times {GC.start}
     #   end
     #
-    # @version 5.0.0
-    #
     def on_refork(key = nil, &block)
       warn_if_in_single_mode('on_refork')
 
@@ -1194,8 +1190,6 @@ def shutdown_debug(val=true)
     # @see Puma::Server#handle_servers
     # @see Puma::ThreadPool#wait_for_less_busy_worker
     #
-    # @version 5.0.0
-    #
     def wait_for_less_busy_worker(val=0.005)
       @options[:wait_for_less_busy_worker] = val.to_f
     end
@@ -1269,10 +1263,9 @@ def set_remote_address(val=:socket)
     # A refork will automatically trigger once after the specified number of requests
     # (default 1000), or pass 0 to disable auto refork.
     #
+    # @note This is experimental.
     # @note Cluster mode only.
     #
-    # @version 5.0.0
-    #
     def fork_worker(after_requests=1000)
       @options[:fork_worker] = Integer(after_requests)
     end