Remove a left over print statement from pylibraft (#958)

Follow up to #924, removing a `print` that managed to sneak in.

cc @cjnolet

Authors:
  - Tim Head (https://github.com/betatim)

Approvers:
  - Corey J. Nolet (https://github.com/cjnolet)

URL: #958

python/pylibraft/pylibraft/distance/fused_l2_nn.pyx

@@ -134,7 +134,6 @@ def fused_l2_nn_argmin(X, Y, output, sqrt=True, handle=None):
     if x_c_contiguous != y_c_contiguous:
         raise ValueError("Inputs must have matching strides")
 
-    print(x_dt)
     if x_dt != y_dt:
         raise ValueError("Inputs must have the same dtypes")
     if d_dt != np.int32: