Removing Partition on my MacBook Pro running Mojave

I'm trying to remove a Windows 7 partition on my Macbook Pro Mid 2012 to free up some space on my mac side. I haven't used the windows partition in years. I'm running macOS Mojave on this laptop. But for some reason, when i go to erase the partition windows partition, the format isn't highlighted, so i can't remove it. Can you please advise on how do i remove my windows partition? Do i click on a different format not sure what to do? See images below