Remove unused files

When I first moved to London, I created common.txt to store the address of my
office, my temporary housing, my new phone number, and other information. It
serverd its purpose, but I no longer need it anymore.

bookmarks.txt started out as a dmenu/rofi -> google-chrome integration. This
predates EXWM, which has replaced this with a google-chrome.el module (or
something similarly named).

bookmarks.txt

@@ -1,6 +0,0 @@
-reddit.com/r/unixporn
-reddit.com/r/nixos
-news.ycombinator.com
-gmail.com
-github.com
-github.com/wpcarro

common.txt

@@ -1,16 +0,0 @@
-+44 7384 903246
-
-Belgrave House
-76 Buckingham Palace Rd
-Belgravia, London
-SW1W 9TQ
-
-Supercity
-17 Templeton Place
-Earls Court, London
-SW5 9NB
-
-William Carroll
-Room 17, 6 Cranley Place
-Kensington, London
-SW7 3AB