Yeah, that's what I would recommend.
Sounds like you recorded it into a stereo track, but only used one input (normally the left is used when there's only one)...therefore putting it on the left side.
In Pro Tools, you can create two mono tracks and drag the stereo audio file to these two tracks and Pro Tools will automatically separate them into two mono audio files for you - well, they're already separated in the audio files folder...Pro Tools usually doesn't read stereo audio, but rather, dual mono...I find it to be quite handy.
Anyway, if you're not running Pro Tools, yes, just slide the left pan pot to the center.
Question: Is there any material on the right side of the vocal track?