Issue #3409663 by sakthi_dev, gorkagr, smustgrave: Remove datetime_range icon and library

core/misc/icons/55565b/daterange.svg

.../modules/datetime_range/css/datetime_range.icon.theme.css

...les/datetime_range/css/datetime_range.icon.theme.pcss.css

core/modules/datetime_range/datetime_range.libraries.yml

core/modules/datetime_range/datetime_range.module

core/modules/field_ui/css/field_ui.icons.theme.css

core/modules/field_ui/css/field_ui.icons.theme.pcss.css

...pal/KernelTests/Core/Theme/Stable9LibraryOverrideTest.php