Remove grid lines from game object plane?

Super noob question here but how do I remove these grid lines? I added my texture to the plane but can’t find how to remove the lines.

http://i.imgur.com/eGbi3PO.png

Your SoilBeach material has a texture which is tiled (i.e. repeated) across the surface of the plane. But it’s not a seamless texture, so you can see the edges each time it’s repeated.

Solution? Use a seamless texture.

First you have to understand the difference between seamless and normal one.seamless means nothing its complete same color there is no difference of lighting at edges. for your texture its one side is black and another side is bright.so go here 1

and choose your texture. and you can adjust your tile x,y values also for avoidance. i hope it will help you. and sorry for bad english.

See the instruction below:

I hope it helps.