OP here to clarify
Yes, I do mean Command+Delete (on my MacBook only symbol is present so I misinterpreted). This seems to be a global shortcut on Mac since on most of the text-based apps (including browsers) it deletes a line by default (with the exception of MS-Word I guess, didn't know about that).
I'm a new Mac user coming from Windows background, where Ctrl+Backspace deletes a single word. It is a great productivity boost, hence the reason I'm probably trying to summon it on Mac all the time. Additionally, having Command+Left/Right Arrow to move cursor by a word left/right would also be super useful to complement the workflow.
The behavior I want is achieved by using Option instead of Command, however, it would be nice to have it configurable on Command key as well. Otherwise, I'd rather just have it disabled than deleting a whole line.