Upon Roo Removal in STS: Unexpected exception parsing XML error in webmvc-config.xml

[eros]

Can't found the JIRA for STS, please allow me to post here thsi issue..

Steps to Reproduce:
1) downloaded and successfully extracted the springsource-tool-suite-2.3.0.RELEASE-e3.5.1-win32.zip

2) successfully executed the sts.exe and use the Roo based on the 1.5. First Steps: Your Own Web App in Under 10 Minutes

3) confirmed the Selenium Test in my http://localhost:8080/tenminutes..

from here trying to remove the Roo based on the Chapter 6. Removing Roo

4) successfully executed the following:
4.1) 6.3.1. Step 1: Push-In Refactor
4.2) 6.3.2. Step 2: Annotation Source Code Removal (twice because some Roo Annotations left)

BUT... when I remove the Roo dependency from pom.xml (6.3.3. Step 3: Annotation JAR Removal)...

Unexpected exception parsing XML document from file [C:/workspace-sts-2.3.0.RELEASE/ten-minutes/src/main/webapp/WEB-INF/spring/webmvc-config.xml]; nested exception is org.springframework.beans.factory.NoSuchBeanDefini tionException: No bean named 'org.springframework.web.servlet.handler.SimpleUrl HandlerMapping#ten-minutes#src/main/webapp/WEB-INF/spring/webmvc-config.xml#20' is defined

please refer to the attached screenshot of my STS..

look at webmvc-config.xml, has no any errors indicated instead 3 warnings on the right side near by horizontal scroll bar..
STSbug2.jpg

pom.xml screenshot, svn diff of Roo jar removal...
STSbug.jpg

*in markers area, please focus only on the red box and ignore the other errors (its unrelated errors)