CodingStyle: Remove "Don't use C99-style comments"

Because Linus may still be reading source code on greenbar paper
instead of color terminals with code syntax highlighting and
appropriate font decorations.

Link: http://lkml.kernel.org/r/CA+55aFyQYJerovMsSoSKS7PessZBr4vNp-3QUUwhqk4A4_jcbg@mail.gmail.com



Signed-off-by: Joe Perches <joe@perches.com>