If you are visually selecting from the cursor to the end of the line, you will probably hit:
v$
This isn't always ideal though because the visual selection includes the
newline character at the end of the line. If instead you'd like to motion to
the last non-blank character on the line you can use the g_ motion. This
is great for deleting to the end of the line.
dg_
See :h g_ for more details.
h/t Dorian Karter