Remove one more obsolete limitation from documentation

Author: billsacks

src/Infrastructure/Field/src/ESMF_FieldPr.F90

@@ -239,11 +239,6 @@ subroutine ESMF_FieldRead(field, fileName, keywordEnforcer,        &
 !   should be set to either "internal" or "external" when the ESMF library is built.
 !   Please see the section on Data I/O,~\ref{io:dataio}.
 !
-!   Limitations:
-!   \begin{itemize}
-!     \item Not supported in {\tt ESMF\_COMM=mpiuni} mode.
-!   \end{itemize}
-!
 !   The arguments are:
 !   \begin{description}
 !   \item [field]