MNT: Remove unnecessary array copy=False semantics for numpy 2.0

lib/cartopy/mpl/gridliner.py

@@ -53,21 +53,20 @@
 )
 
 
-def _fix_lons(lons):
+def _fix_lon(lon):
     """
     Fix the given longitudes into the range ``[-180, 180]``.
 
     """
-    lons = np.array(lons, copy=False, ndmin=1)
-    fixed_lons = ((lons + 180) % 360) - 180
-    # Make the positive 180s positive again.
-    fixed_lons[(fixed_lons == -180) & (lons > 0)] *= -1
-    return fixed_lons
+    # positive 180 should stay positive
+    if lon == 180:
+        return 180
+    return ((lon + 180) % 360) - 180
 
 
 def _lon_hemisphere(longitude):
     """Return the hemisphere (E, W or '' for 0) for the given longitude."""
-    longitude = _fix_lons(longitude)
+    longitude = _fix_lon(longitude)
     if longitude > 0:
         hemisphere = 'E'
     elif longitude < 0: