You you can remove that partition, but then you may not be able to use some features such as included backup.
For deleting that partition:
> right click on "Computer" and click on "Manage".
> Select "Disk Management" from the left pane.
> Right click the partition you want to delete and click on"Delete Volume".
> Click on "Yes" to continue.
Above steps will create an unallocated space. to combine it with the neighbouring partitions, follow these steps:
> After completing the above steps, do not close the disk management window.
> Right click on the neighbour partition you want to expand and click on "Extend Volume".
> enter the size on extra space you want to add.
> Click continue.
You're done.