How to remove op messages?

                                                                                                                                                    ^{I apologize for my English, I am Polish and I can not speak English. I use Google Translate for translation.}

I have one question. Is there any way to make messages such as:

[BarrrrtekXD: Playing effect magicCrit for 3 times]

or

[Server: Saved the world]

?

Please answer as soon as possible because it annoys me very much

Quote from Roman

Sorry, I don't really understand you.

Do you want to remove such messages or do you want to post them manually?

I don't understand you XD

Quote from Roman

Sorry, I don't really understand you.

Do you want to remove such messages or do you want to post them manually?

I just want these messages not to be displayed for me (sorry for my English)