REF: removed unused convert keyword

Author: jbrockmendel

pandas/core/arrays/string_.py

@@ -354,9 +354,7 @@ def _str_map(
         self, f, na_value=None, dtype: Dtype | None = None, convert: bool = True
     ):
         if self.dtype.na_value is np.nan:
-            return self._str_map_nan_semantics(
-                f, na_value=na_value, dtype=dtype, convert=convert
-            )
+            return self._str_map_nan_semantics(f, na_value=na_value, dtype=dtype)
 
         from pandas.arrays import BooleanArray
 
@@ -431,9 +429,7 @@ def _str_map_str_or_object(
             # -> We don't know the result type. E.g. `.get` can return anything.
             return lib.map_infer_mask(arr, f, mask.view("uint8"))
 
-    def _str_map_nan_semantics(
-        self, f, na_value=None, dtype: Dtype | None = None, convert: bool = True
-    ):
+    def _str_map_nan_semantics(self, f, na_value=None, dtype: Dtype | None = None):
         if dtype is None:
             dtype = self.dtype
         if na_value is None: