Remove unnecessary expression (#7648)
Since wordPart is checked for falsiness on the previous line, it will always evaluate to an empty string. The expression in the parentheses will then evaluate to `"" || ""`, which I assume is not desired.
Ref: https://lgtm.com/projects/g/prettier/prettier/snapshot/ecfc5e9b8320d79ed8a801d811e0a63892b040d0/files/src/printer-postcss.js?sort=name&dir=ASC&mode=heatmap#L468
