Fix todo

res/sections/45-WirelessStandards.tex

@@ -34,8 +34,7 @@ \section{802.11e}
 for transmitting in the channel.
 
 \paragraph*{PCF}\todo{This paragraph is very confused, please check it out
-  carefully!} It's a priority that is centrally controlled,\todo{I've copied
-  what's been written in the slides, but I dunno what it means!} the PC (point
+  carefully!} It's a priority that is centrally controlled, the PC (point
 coordinator) is usually also the AP (access point).
 After each beacon there is a CP (content period) and a CFP (contention free
 period). PCF has several problems that lead this channel access method to not