Fix comment typo
Fix comment typo

Incorrect comment in group_remove_container

Former-commit-id: ab9f89a1741ec8d20a3d45e6c5e880d678b33e22
tomdee/libcalico,projectcalico/libcalico,TrimBiggs/libnetwork-plugin,insequent/libcalico,TrimBiggs/libcalico,tomdee/libnetwork-plugin,TrimBiggs/libnetwork-plugin,plwhite/libcalico,robbrockbank/libcalico,caseydavenport/libcalico,L-MA/libcalico,projectcalico/libnetwork-plugin,Symmetric/libcalico,djosborne/libcalico,alexhersh/libcalico