diff --git a/matlab/@dynDate/lt.m b/matlab/@dynDate/lt.m
deleted file mode 100644
index 789814ddf..000000000
--- a/matlab/@dynDate/lt.m
+++ /dev/null
@@ -1,98 +0,0 @@
-function c = lt(a,b) % --*-- Unitary tests --*--
-
-%@info:
-%! @deftypefn {Function File} {@var{c} =} lt (@var{a},@var{b})
-%! @anchor{@dynDate/lt}
-%! @sp 1
-%! Overloads the lt (less than) operator for the Dynare dates class (@ref{dynDate}).
-%! @sp 2
-%! @strong{Inputs}
-%! @sp 1
-%! @table @ @var
-%! @item a
-%! Dynare date object instantiated by @ref{dynDate}.
-%! @item b
-%! Dynare date object instantiated by @ref{dynDate}.
-%! @end table
-%! @sp 1
-%! @strong{Outputs}
-%! @sp 1
-%! @table @ @var
-%! @item c
-%! scalar integer equal to one if a<b, 0 otherwise.
-%! @end table
-%! @sp 2
-%! @strong{This function is called by:}
-%! @sp 2
-%! @strong{This function calls:}
-%!
-%! @end deftypefn
-%@eod:
-
-% Copyright (C) 2011-2013 Dynare Team
-%
-% This file is part of Dynare.
-%
-% Dynare is free software: you can redistribute it and/or modify
-% it under the terms of the GNU General Public License as published by
-% the Free Software Foundation, either version 3 of the License, or
-% (at your option) any later version.
-%
-% Dynare is distributed in the hope that it will be useful,
-% but WITHOUT ANY WARRANTY; without even the implied warranty of
-% MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
-% GNU General Public License for more details.
-%
-% You should have received a copy of the GNU General Public License
-% along with Dynare.  If not, see <http://www.gnu.org/licenses/>.
-
-if nargin~=2
-    error('dynDate::eq: I need exactly two input arguments!')
-end
-
-if ~( isa(a,'dynDate') && isa(b,'dynDate'))
-    error(['dynDate::lt: Input arguments ' inputname(1) ' and ' inputname(2) ' have to be a dynDate objects!'])
-end
-
-if ~isequal(a.freq,b.freq)
-    error(['dynDate::lq: Input arguments ' inputname(1) ' and ' inputname(2) ' have no common frequencies!'])
-end
-
-if a.time(1)<b.time(1)
-    c = 1;
-elseif isequal(a.time(1),b.time(1))
-    if a.time(2)<b.time(2)
-        c = 1;
-    else
-        c = 0;
-    end
-else
-    c = 0;
-end
-
-%@test:1
-%$ % Define some dates
-%$ date_1 = 1950;
-%$ date_2 = '1950Q2';
-%$ date_3 = '1950Q3';
-%$ date_4 = '1950Q1';
-%$ date_5 = '1949Q2';
-%$
-%$ % Call the tested routine.
-%$ d1 = dynDate(date_1);
-%$ d2 = dynDate(date_2);
-%$ d3 = dynDate(date_3);
-%$ d4 = dynDate(date_4);
-%$ d5 = dynDate(date_5);
-%$ i1 = (d2<d3);
-%$ i2 = (d3<d4);
-%$ i3 = (d4<d2);
-%$ i4 = (d5<d4);
-%$
-%$ % Check the results.
-%$ t(1) = dyn_assert(i1,1);
-%$ t(2) = dyn_assert(i2,0);
-%$ t(3) = dyn_assert(i3,1);
-%$ t(4) = dyn_assert(i4,1);
-%$ T = all(t);
-%@eof:1