Do you know what variety they are? Some varieties (June-bearing, in theory, but it depends on climate) only produce one heavy crop and then shut down until next year. You may have one of those. Or, your plants may produce again in the fall. You might want to wait and see before you get rid of them.
If you don't want your plants to spread, you can cut the runners off. Or, if you want more plants of that variety, you can wait for the little plants at the end of the runners to root, then cut them off and transplant them. But it sounds to me like what you need to do is look for some more plants of different varieties so you have a longer fruiting season.
Re-reading your post, I realized that you just planted these not too long ago -- strawberries will produce a little the first year they are planted, but they should do much better the second year. How well they produce after that depends on how well they are cared for. Commercial growers usually till them under after the second year crop, though sometimes they just till lightly to 'renovate' them and get a third year crop out of them. A home grower with a small patch kept well-weeded and fertilized ought to be able to get several years of good production out of their plants.
Hope this helps.
Kathleen