The datetime C API really isn't usable outside the datetime module

implementation, so remove this decoy (it break formatting of the GNU
info version of the docs).

Doc/lib/libdatetime.tex

@@ -1398,57 +1398,3 @@ C standard added additional format codes.
 The exact range of years for which \method{strftime()} works also
 varies across platforms.  Regardless of platform, years before 1900
 cannot be used.
-
-
-\begin{comment}
-
-\subsection{C API}
-
-Struct typedefs:
-
-    PyDateTime_Date
-    PyDateTime_DateTime
-    PyDateTime_Time
-    PyDateTime_Delta
-    PyDateTime_TZInfo
-
-Type-check macros:
-
-    PyDate_Check(op)
-    PyDate_CheckExact(op)
-
-    PyDateTime_Check(op)
-    PyDateTime_CheckExact(op)
-
-    PyTime_Check(op)
-    PyTime_CheckExact(op)
-
-    PyDelta_Check(op)
-    PyDelta_CheckExact(op)
-
-    PyTZInfo_Check(op)
-    PyTZInfo_CheckExact(op)
-
-Accessor macros:
-
-All objects are immutable, so accessors are read-only.  All macros
-return ints:
-
-    For \class{date} and \class{datetime} instances:
-        PyDateTime_GET_YEAR(o)
-        PyDateTime_GET_MONTH(o)
-        PyDateTime_GET_DAY(o)
-
-    For \class{datetime} instances:
-        PyDateTime_DATE_GET_HOUR(o)
-        PyDateTime_DATE_GET_MINUTE(o)
-        PyDateTime_DATE_GET_SECOND(o)
-        PyDateTime_DATE_GET_MICROSECOND(o)
-
-    For \class{time} instances:
-        PyDateTime_TIME_GET_HOUR(o)
-        PyDateTime_TIME_GET_MINUTE(o)
-        PyDateTime_TIME_GET_SECOND(o)
-        PyDateTime_TIME_GET_MICROSECOND(o)
-
-\end{comment}