Remove sage.finance, deprecated in #32427 (2021)

Author: Matthias Koeppe

src/doc/en/reference/finance/conf.py

@@ -66,7 +66,6 @@ Probability and Statistics
 
 * :doc:`Probability <probability/index>`
 * :doc:`Statistics <stats/index>`
-* :doc:`Quantitative Finance <finance/index>`
 
 Mathematical Structures
 -----------------------

src/doc/en/reference/finance/index.rst

@@ -141,8 +141,6 @@
 from sage.stats.all      import *
 import sage.stats.all as stats
 
-lazy_import("sage.finance", "all", as_="finance", deprecation=32427)
-
 from sage.parallel.all   import *
 
 from sage.ext.fast_callable  import fast_callable