The "no restrictions on free choice" is in a previous paragraph of the Libertarian Party Platform plank titled "Women's Rights and Abortion":
We hold that individual rights should not be denied or abridged on the basis of sex. We call for repeal of all laws discriminating against women, such as protective labor laws and marriage or divorce laws which deny the full rights of men and women. We oppose all laws likely to impose restrictions on free choice and private property or to widen tyranny through reverse discrimination.
I think it's pretty obvious that the "free choice" in this particular paragraph refers to laws which discriminate against women, and does not refer to a "pro-choice" abortion position. Now if you want to conclude that the subsequent paragraph, which opposes all government involvement in the abortion issue, is tantamount to a pro-choice position because it does not advocate a government ban on abortion, that's a legitimate argument. But a fair reading of the plank makes clear that there are substantial differences (in fact a range of differences) among Libertarians on the abortion issue.
And if that doesn't fit neatly into your preconceived Libertarian stereotype, too bad.
We oppose all laws likely to impose restrictions on free choice...
I think its abundantly clear, what this means. Its even titled under, Women's Rights and Abortion. I'll stick with the obvious. The Libertarian Party is opposed to "all laws likely to impose restrictions on free choice". It really can't be said any other way, or better way, for that matter. It is the Libertarian Party philosophy. The wording here is precise and concise. The government has no right to impose restrictions on a woman's choice, to have an abortion. The statement in the plank that says, "... we believe the government should be kept out of the question [of abortion]", is pretty strong stuff wording too.
But a fair reading of the plank makes clear that there are substantial differences (in fact a range of differences) among Libertarians on the abortion issue.
I'm not ignorant of the fact, that some libertarians are pro-life. Again, I did mention the Liberty Caucus. Did I not?