removing QuickTime player from El Capitan

i'm trying to remove Quicktime player from my Macbook

but it included and well implanted in El Capitan i tried

this in terminal cd /Applications/ then sudo rm -rf QuickTime\ Player.app/

and the answers is this

rm: QuickTime Player.app//Contents/_CodeSignature/CodeResources: Operation not permitted

rm: QuickTime Player.app//Contents/_CodeSignature: Operation not permitted

rm: QuickTime Player.app//Contents/Info.plist: Operation not permitted

rm: QuickTime Player.app//Contents/MacOS/QuickTime Player: Operation not permitted

Does this mean i can not remove Quicktime no matter what ?

if some knows how please !!

Thank you