drop extra logic for startHour

Author: archmoj

src/plots/cartesian/axes.js

@@ -968,13 +968,6 @@ axes.tickFirst = function(ax) {
     var dtick = ax.dtick;
     var tick0 = r2l(ax.tick0);
 
-    if(ax._dayHours && ax.tickmode === 'auto') {
-        var tick0Hour = Math.floor(tick0 / ONEHOUR) % 24;
-        if(tick0Hour === 0 && tick0Hour < ax._startHour) {
-            tick0 += ONEHOUR * ax._startHour;
-        }
-    }
-
     if(isNumeric(dtick)) {
         var tmin = sRound((r0 - tick0) / dtick) * dtick + tick0;
 

src/plots/cartesian/axis_defaults.js

@@ -144,13 +144,6 @@ module.exports = function handleAxisDefaults(containerIn, containerOut, coerce,
                 if(brk.pattern === HOUR) {
                     containerOut._hasHourBreaks = true;
 
-                    var startHour = Math.max((brk.bounds[0] % 24), (brk.bounds[1] % 24));
-                    if(containerOut._startHour === undefined) {
-                        containerOut._startHour = startHour;
-                    } else {
-                        containerOut._startHour = Math.max(containerOut._startHour, startHour);
-                    }
-
                     var dayHours = (brk.bounds[1] - brk.bounds[0] + 24) % 24;
                     if(containerOut._dayHours === undefined) {
                         containerOut._dayHours = dayHours;