Remove redundant abs()

Author: chaosink

ot/lp/solver_1d.py

@@ -129,7 +129,7 @@ def wasserstein_1d(u_values, v_values, u_weights=None, v_weights=None, p=1, requ
     diff_quantiles = nx.abs(u_quantiles - v_quantiles)
 
     if p == 1:
-        return nx.sum(delta * nx.abs(diff_quantiles), axis=0)
+        return nx.sum(delta * diff_quantiles, axis=0)
     return nx.sum(delta * nx.power(diff_quantiles, p), axis=0)