RM unused excel helper functions

src/misc.py

@@ -346,22 +346,3 @@ def not_none(v: Optional[T]) -> T:
     if v is None:
         raise ValueError()
     return v
-
-
-def column_num_to_string(n: int) -> str:
-    # References: https://stackoverflow.com/a/63013258/8979290
-    n, rem = divmod(n - 1, 26)
-    char = chr(65 + rem)
-    if n:
-        return column_num_to_string(n) + char
-    else:
-        return char
-
-
-def column_string_to_num(s: str) -> int:
-    # References: https://stackoverflow.com/a/63013258/8979290
-    n = ord(s[-1]) - 64
-    if s[:-1]:
-        return 26 * (column_string_to_num(s[:-1])) + n
-    else:
-        return n

src/taxman.py

@@ -931,7 +931,7 @@ def get_format(field: dataclasses.Field) -> Optional[xlsxwriter.format.Format]:
             ws.write_row(0, 0, labels, header_format)
             # Set height
             ws.set_row(0, 45)
-            ws.autofilter(f"A1:{misc.column_num_to_string(len(labels))}1")
+            ws.autofilter(0, 0, 0, len(labels) - 1)
 
             # Data
             for row, entry in enumerate(tax_report_entries, 1):