CLN: Remove deprecated numba functions (pandas-dev#53455)

CLN/DEPR: Remove deprecated numba functions

Author: lithomas1

pandas/core/groupby/numba_.py

@@ -92,7 +92,7 @@ def generate_numba_agg_func(
     -------
     Numba function
     """
-    numba_func = jit_user_function(func, nopython, nogil, parallel)
+    numba_func = jit_user_function(func)
     if TYPE_CHECKING:
         import numba
     else:
@@ -152,7 +152,7 @@ def generate_numba_transform_func(
     -------
     Numba function
     """
-    numba_func = jit_user_function(func, nopython, nogil, parallel)
+    numba_func = jit_user_function(func)
     if TYPE_CHECKING:
         import numba
     else:

pandas/core/util/numba_.py

@@ -1,14 +1,11 @@
 """Common utilities for Numba operations"""
 from __future__ import annotations
 
-import types
 from typing import (
     TYPE_CHECKING,
     Callable,
 )
 
-import numpy as np
-
 from pandas.compat._optional import import_optional_dependency
 from pandas.errors import NumbaUtilError
 
@@ -63,27 +60,20 @@ def get_jit_arguments(
     return {"nopython": nopython, "nogil": nogil, "parallel": parallel}
 
 
-def jit_user_function(
-    func: Callable, nopython: bool, nogil: bool, parallel: bool
-) -> Callable:
+def jit_user_function(func: Callable) -> Callable:
     """
-    JIT the user's function given the configurable arguments.
+    If user function is not jitted already, mark the user's function
+    as jitable.
 
     Parameters
     ----------
     func : function
         user defined function
-    nopython : bool
-        nopython parameter for numba.JIT
-    nogil : bool
-        nogil parameter for numba.JIT
-    parallel : bool
-        parallel parameter for numba.JIT
 
     Returns
     -------
     function
-        Numba JITed function
+        Numba JITed function, or function marked as JITable by numba
     """
     if TYPE_CHECKING:
         import numba
@@ -94,19 +84,6 @@ def jit_user_function(
         # Don't jit a user passed jitted function
         numba_func = func
     else:
-
-        @numba.generated_jit(nopython=nopython, nogil=nogil, parallel=parallel)
-        def numba_func(data, *_args):
-            if getattr(np, func.__name__, False) is func or isinstance(
-                func, types.BuiltinFunctionType
-            ):
-                jf = func
-            else:
-                jf = numba.jit(func, nopython=nopython, nogil=nogil)
-
-            def impl(data, *_args):
-                return jf(data, *_args)
-
-            return impl
+        numba_func = numba.extending.register_jitable(func)
 
     return numba_func

pandas/core/window/numba_.py

@@ -48,7 +48,7 @@ def generate_numba_apply_func(
     -------
     Numba function
     """
-    numba_func = jit_user_function(func, nopython, nogil, parallel)
+    numba_func = jit_user_function(func)
     if TYPE_CHECKING:
         import numba
     else:
@@ -207,7 +207,7 @@ def generate_numba_table_func(
     -------
     Numba function
     """
-    numba_func = jit_user_function(func, nopython, nogil, parallel)
+    numba_func = jit_user_function(func)
     if TYPE_CHECKING:
         import numba
     else: