refactor(time-picker): remove invalid theme property from sample

Author: simeonoff

src/app/scheduling/timepicker/timepicker-styling/timepicker-styling.component.scss

@@ -10,7 +10,6 @@ $my-time-picker-theme: time-picker-theme(
   $selected-text-color: #ECAA53,
   $header-background: #ECAA53,
   $header-hour-text-color: #011627,
-  $header-time-period-color: #011627,
   $background-color: #011627
 );