Help with Migrating Netscaler Rewrite Policy to F5 LTM

Hello,

I am currently working on migrating configurations from Netscaler to F5 LTM and I'm stuck with this policy:

rewrite policy Delete_Body-policy "http.RES.FULL_HEADER.CONTAINS(\"HTTP/1.1 404\")" Delete_Body_action  
add rewrite action Delete_Body_action delete "http.res.body(40000)"

Any guidance or advice would be greatly appreciated.

Thank you.