Remove incorrect information about bit-size
Remove incorrect information about bit-size

UTF-8 is a variable-width encoding that uses octets, UTF-16
is a variable-width encoding that uses 16-bit words, and
UCS-2 is an obsolete fixed-width encoding that doesn't not
support characters beyond the BMP. Explaining this would be
unwieldly, so we just removed the information.

See also: http://www.reddit.com/info/6mlqc/comments/c04aold

Signed-off-by: Edward Z. Yang <71e3051a204377f8d7e885f17897f01c539d4005@thewritingpot.com>

r-kovalenko/htmlpurifier,bartbutler/htmlpurifier,stefanotorresi/htmlpurifier,ezyang/htmlpurifier,r-kovalenko/htmlpurifier,bfroehle/htmlpurifier,Masterjoa/HTMLPurifier-standalone,ezyang/htmlpurifier,stefanotorresi/htmlpurifier,ezyang/htmlpurifier,stefanotorresi/htmlpurifier,bfroehle/htmlpurifier,stefanotorresi/htmlpurifier,Masterjoa/HTMLPurifier-standalone,Janson-Leung/htmlpurifier,bfroehle/htmlpurifier,Janson-Leung/htmlpurifier,ezyang/htmlpurifier,Janson-Leung/htmlpurifier,bartbutler/htmlpurifier,r-kovalenko/htmlpurifier,Janson-Leung/htmlpurifier,bartbutler/htmlpurifier,bartbutler/htmlpurifier,r-kovalenko/htmlpurifier