api/auth: extracting removeUserFromTeam function
api/auth: extracting removeUserFromTeam function

This function receives the user email and the team name. Trying to
separate concerns, for easy integration with gitosis.

ArxdSilva/tsuru,gwmoura/tsuru,gwmoura/tsuru,hcxiong/tsuru,guilhermebr/tsuru,jblancett/tsuru,cgvarela/tsuru,ArxdSilva/tsuru,firebitsbr/tsuru,ggarnier/tsuru,kgrvamsi/tsuru,mderaldo/tsuru,gciotta/tsuru,guilhermebr/tsuru,cezarsa/tsuru,firebitsbr/tsuru,mderaldo/tsuru,tsuru/tsuru,cezarsa/tsuru,ggarnier/tsuru,tuxmonteiro/tsuru,cezarsa/tsuru,Endika/tsuru,jblancett/tsuru,4eek/tsuru,tsuru/tsuru,mderaldo/tsuru,guilhermebr/tsuru,RichardKnop/tsuru,4eek/tsuru,gciotta/tsuru,gciotta/tsuru,gwmoura/tsuru,cezarsa/tsuru,RichardKnop/tsuru,ArxdSilva/tsuru,tuxmonteiro/tsuru,guilhermebr/tsuru,jblancett/tsuru,cgvarela/tsuru,ggarnier/tsuru,hugoantunes/tsuru,ggarnier/tsuru,firebitsbr/tsuru,tuxmonteiro/tsuru,RichardKnop/tsuru,ArxdSilva/tsuru,cgvarela/tsuru,tsuru/tsuru,4eek/tsuru,hugoantunes/tsuru,Endika/tsuru,hcxiong/tsuru,hcxiong/tsuru,tsuru/tsuru,kgrvamsi/tsuru,Endika/tsuru,kgrvamsi/tsuru