Remove support for using datenums as time variables

Datenums have problems like lack of timezone, use datetimes instead

Author: EnricSala

influxdb-client/QueryBuilder.m

@@ -118,9 +118,6 @@
             elseif isdatetime(before)
                 str = TimeUtils.formatDatetime(before, precision, true);
                 obj.Before = ['time < ' str];
-            elseif isfloat(before)
-                str = TimeUtils.formatDatenum(before, precision, true);
-                obj.Before = ['time < ' str];
             else
                 error('unsupported before type');
             end
@@ -138,9 +135,6 @@
             elseif isdatetime(before)
                 str = TimeUtils.formatDatetime(before, precision, true);
                 obj.Before = ['time <= ' str];
-            elseif isfloat(before)
-                str = TimeUtils.formatDatenum(before, precision, true);
-                obj.Before = ['time <= ' str];
             else
                 error('unsupported before type');
             end
@@ -158,9 +152,6 @@
             elseif isdatetime(after)
                 str = TimeUtils.formatDatetime(after, precision, true);
                 obj.After = ['time > ' str];
-            elseif isfloat(after)
-                str = TimeUtils.formatDatenum(after, precision, true);
-                obj.After = ['time > ' str];
             else
                 error('unsupported before type');
             end
@@ -178,9 +169,6 @@
             elseif isdatetime(after)
                 str = TimeUtils.formatDatetime(after, precision, true);
                 obj.After = ['time >= ' str];
-            elseif isfloat(after)
-                str = TimeUtils.formatDatenum(after, precision, true);
-                obj.After = ['time >= ' str];
             else
                 error('unsupported before type');
             end

influxdb-client/Series.m

@@ -50,8 +50,6 @@
         function obj = time(obj, time)
             if isdatetime(time)
                 obj.Time = time;
-            elseif isfloat(time)
-                obj.Time = datetime(time, 'ConvertFrom', 'datenum', 'TimeZone', 'local');
             else
                 error('unsupported time type');
             end

influxdb-client/TimeUtils.m

@@ -21,15 +21,6 @@
             end
         end
 
-        % Format a datenum as a string
-        function str = formatDatenum(dnum, precision, appendPrecision)
-            if nargin < 2, precision = TimeUtils.DEFAULT_PRECISION; end
-            if nargin < 3, appendPrecision = TimeUtils.DEFAULT_APPEND_PRECISION; end
-            warning('datenums do not specify a timezone, assuming local');
-            dtime = datetime(dnum, 'ConvertFrom', 'datenum', 'TimeZone', 'local');
-            str = TimeUtils.formatDatetime(dtime, precision, appendPrecision);
-        end
-        
         % Convert a timestamp to a datetime
         function dtime = toDatetime(timestamp, precision)
             scale = TimeUtils.scaleOfPrecision(precision);