Groups list: Support dynamic fonts by enabling self-sizing table view cell, and use constraints to define the cell’s size.

vector-im/riot-meta#114

Riot/Views/Group/GroupInviteTableViewCell.m

@@ -91,11 +91,4 @@ NSString *const kGroupInviteTableViewCellRoomKey = @"kGroupInviteTableViewCellRo
     [super render:cellData];
 }
 
-+ (CGFloat)heightForCellData:(MXKCellData *)cellData withMaximumWidth:(CGFloat)maxWidth
-{
-    // The height is fixed
-    // @TODO change this to support dynamic fonts
-    return 105;
-}
-
 @end