How many mailing lists are you on that fill your email inbox every day? Figuring out how to unsubscribe from all of them can be a pain. From that frustration was born Unsubscribe.com, an LA-based startup that just closed a $2.1 million Series A financing. Charles River Ventures led the round. Other investors include Ron Conway’s SV Angel, First Round Capital, DFJ Frontier as well as angel investors including Matt Coffin, Tim Ferriss, and Matt