[#2420] Removed outline on datepicker

[VBoudreau55]

Description

Removed the @include focus-outline; line to remove outline when the element is focused

Types of changes

• [x] Bug fix (non-breaking change which fixes an issue)
• [ ] New feature (non-breaking change which adds functionality)
• [ ] Breaking change (fix or feature that would cause existing functionality to not work as expected)
• [x] Improvement/refactoring (non-breaking change that doesn't add any feature but make things better)