[@mantine/core] DatePickerInput: Fix incorrect aria-label being set…

… on the input element (#6530)

according to accessibility parts of DatePickerInput docs it is said that if `label` prop is set, input will be accessible it is not required to set `aria-label`.

But since there was assignment of `aria-label` inside PickerInputBase on Input it essentially overrode the label from InputWrapper connected with `htmlFor` attribute.

It made component harder to use inside e2e tests that rely on labels for element locators, since component locator should be dynamic or `aria-label` attribute must be passed alongside with `label` attribute

packages/@mantine/dates/src/components/PickerInputBase/PickerInputBase.tsx

@@ -172,7 +172,6 @@ export const PickerInputBase = factory<PickerInputBaseFactory>((_props, ref) =>
         >
           <Popover.Target>
             <Input
-              aria-label={formattedValue || placeholder}
               data-dates-input
               data-read-only={readOnly || undefined}
               disabled={disabled}