CLN: remove out-of-date reference to maybe_split

Author: ngoldbaum

pandas/core/internals/blocks.py

@@ -480,7 +480,7 @@ def convert(
 
         values = self.values
         if values.ndim == 2:
-            # maybe_split ensures we only get here with values.shape[0] == 1,
+            # the check above ensures we only get here with values.shape[0] == 1,
             # avoid doing .ravel as that might make a copy
             values = values[0]