[basic.fundamental] Remove a footnote that was describing a particular possible manifestation of undefined behaviour

The note was problematic, as (by omission) it suggested that such behaviour might not be true for other types.

Author: jfbastien

source/basic.tex

@@ -4364,10 +4364,7 @@
 alignment requirements as
 an \impldef{underlying type of \tcode{bool}} unsigned integer type.
 The values of type \tcode{bool} are
-\tcode{true} and \tcode{false}.\footnote{Using a \tcode{bool} value
-in ways described by this document as ``undefined'',
-such as by examining the value of an uninitialized automatic object,
-might cause it to behave as if it is neither \tcode{true} nor \tcode{false}.}
+\tcode{true} and \tcode{false}.
 \begin{note}
 There are no \tcode{signed}, \tcode{unsigned},
 \tcode{short}, or \tcode{long bool} types or values.