Remove mention to calling functions in error message in _nearest_neighbor_haversine

Co-authored-by: Chahan M. Kropf <chahan.kropf@usys.ethz.ch>

Author: luseverin

climada/util/coordinates.py

@@ -1386,10 +1386,8 @@ def _nearest_neighbor_haversine(centroids, coordinates, unit, threshold):
     # first check that unit is in degree
     if unit != "degree":
         raise ValueError(
-            "Only degree unit is supported for nearest neighbor matching using"
-            "'haversine' distance. Please use euclidean distance by setting "
-            "'distance=euclidean' in the match_coordinates or match_centroids "
-            "function when using units that are not degrees."
+            "Only coordinates in degree units are supported for nearest neighbor matching using"
+            "'haversine' distance."
         )
     # Construct tree from centroids
     tree = BallTree(np.radians(centroids), metric="haversine")