rm coerce in internals

Author: ResidentMario

pandas/core/internals.py

@@ -399,7 +399,7 @@ def fillna(self, value, limit=None, inplace=False, downcast=None,
             if not mask.any():
                 return self if inplace else self.copy()
 
-            if errors == 'coerce' or errors == 'raise':
+            if errors == 'coerce':
                 # we cannot coerce the underlying object, so
                 # make an ObjectBlock
                 return self.to_object_block(mgr=mgr).fillna(original_value,