Remove note about graceful shutdown requiring Tomcat 9.0.33

Since the note was added, we've upgraded to and now require Tomcat
10.1 so it no longer applies.

Closes gh-42373

Author: wilkinsona

spring-boot-project/spring-boot-docs/src/docs/asciidoc/web/graceful-shutdown.adoc

@@ -13,8 +13,6 @@ TIP: To learn about more the specific method used with your web server, see the
 Jetty, Reactor Netty, and Tomcat will stop accepting new requests at the network layer.
 Undertow will accept new connections but respond immediately with a service unavailable (503) response.
 
-NOTE: Graceful shutdown with Tomcat requires Tomcat 9.0.33 or later.
-
 To enable graceful shutdown, configure the configprop:server.shutdown[] property, as shown in the following example:
 
 [source,yaml,indent=0,subs="verbatim",configprops,configblocks]