suppress "member removed" from the Recent Activity events that are displayed on the Home tab for a group on Curriki

Per a chat between Jen & Josh:

[3:25:26 PM] Jennifer Lytle says: design question for Recent Activity Panel – events listing
[3:26:05 PM] Jennifer Lytle says: ping back when available to discuss briefly whether the recent activity should include "Member removed" – i am thinking we should not remark on this event
[3:27:28 PM] Joshua Marks says: Well, I think the spec says that this is included. We can surpress if there is a good reason.
[3:27:53 PM] Jennifer Lytle says: i do not feel this should be advertised
[3:28:07 PM] Jennifer Lytle says: b/c the rule is that the variable of member name be hot to a member's profile – it's just weird
[3:28:43 PM] Jennifer Lytle says: this seems like a place to advertise the positives and proactives, not the reductives
[3:29:05 PM] Joshua Marks says: I agree. Please send a Jira Item to Todd for the change.