tkinter: Delete pack_content from Pack and similarly place_content and grid_content (#15767)

Author: Akuli

stdlib/@tests/stubtest_allowlists/py315.txt

@@ -183,7 +183,11 @@ profiling.sampling.module_utils
 profiling.sampling.opcode_utils
 profiling.sampling.sample
 
-# These conflicting aliases are just like tkinter.*.slaves in common.txt.
+# These aliases are just like the aliases named "slaves" instead of "content".
+# See common.txt.
 tkinter.Grid.content
+tkinter.Grid.grid_content
 tkinter.Pack.content
+tkinter.Pack.pack_content
 tkinter.Place.content
+tkinter.Place.place_content

stdlib/tkinter/__init__.pyi

@@ -1112,8 +1112,6 @@ class Pack:
     ) -> None: ...
     def pack_forget(self) -> None: ...
     def pack_info(self) -> _PackInfo: ...  # errors if widget hasn't been packed
-    if sys.version_info >= (3, 15):
-        def pack_content(self) -> list[Widget]: ...
     pack = pack_configure
     forget = pack_forget
     propagate = Misc.pack_propagate
@@ -1152,8 +1150,6 @@ class Place:
     ) -> None: ...
     def place_forget(self) -> None: ...
     def place_info(self) -> _PlaceInfo: ...
-    if sys.version_info >= (3, 15):
-        def place_content(self) -> list[Widget]: ...
     place = place_configure
     info = place_info
 
@@ -1191,8 +1187,6 @@ class Grid:
     def grid_forget(self) -> None: ...
     def grid_remove(self) -> None: ...
     def grid_info(self) -> _GridInfo: ...
-    if sys.version_info >= (3, 15):
-        def grid_content(self, row: int | None = None, column: int | None = None) -> list[Widget]: ...
     grid = grid_configure
     location = Misc.grid_location
     size = Misc.grid_size