Remove extraneous line from 'creating a new model' code snippet

The line being removed was confusing, because it wasn't clear why the first one returns false and the second returns without a value.  On looking at the JSBin and the code diffs, I saw that the first line wasn't there, it must have been left over from an older version of the code.  So I removed the extraneous line to bring the code snippet more in line with the actual code.