Remove unused import

[cardil]

sampler/sampler-api/src/main/java/pl/wavesoftware/sampler/api/RandomSource.java

Line 20 in 337fbac

import java.util.function.Supplier;

[Vignesh-Durairaj]

I will take this up ! It'll help me understand the open-source-contribution life cycle.

[Vignesh-Durairaj]

Pull request #4 has been raised, which may fix/close this issue. Kindly review the same.