Filters word combinations that consist of a single one-character word.

@param {WordCombination[]} wordCombinations The word combinations to filter.
@returns {WordCombination[]} Filtered word combinations.
function filterOneCharacterWordCombinations( wordCombinations ) {
	return wordCombinations.filter( function( combination ) {
		return ! ( combination.getLength() === 1 && combination.getWords()[ 0 ].length <= 1 );
	} );
}