Removed needless include

Semphris · Semphris · commit 3778cf9be239 · 2022-03-19T15:51:22.000-04:00
(added by me, probably the remains of something I tried with regexes, but I changed plans and used something that didn't need regexes and forgot to remove the include
diff --git a/src/control/keyboard_config.cpp b/src/control/keyboard_config.cpp
@@ -16,8 +16,6 @@
 
 #include "control/keyboard_config.hpp"
 
-#include <regex>
-
 #include <boost/optional.hpp>
 
 #include "util/log.hpp"
