Is it important to unlearn a few things to grow in a team?

Unlearn may not be the right way of putting it. But yes, as the needs of the organization change, one has to evolve and grow into the person he is intended to be by acquiring needed skills / knowledge / attitudes.

You can replace "unlearn" with "not implement" or "stop doing" and in that case the answer would be "yes".

It is not necessary to "unlearn" things but it is important to know what really works and what is required for growth and do it.

One does not have to change himself or his values or principles to grow but may have to change his attitude and approach. No need to change the end but you may change the mean, no need to change the destination but you may change the road. 

Thanks for invitation,

Yes of course, especially when these things are closely related to enhance the spirit of cooperation and coordination between team members. 

My views are similar to Mr. Said Kamha's 

Thanks 

Yes, it is very important to learn so many things to grow not only team but organization too 

In agreement with above experts opinions.

Thank you. I agree with experts answer.

Yes. There are things which are not necessary but may come attached with one subject. You can ignore them as they may take your time and cost. The proverb: "Who cares about the dead fish except the fisherman" may support to answer your question.

Thanks to invite.

Agreed with Mr. Ali Ahmad.