Remove special handling due to IPython lacking support for exception groups

Author: jakkdl

trio/_core/_multierror.py

@@ -11,9 +11,7 @@
 from trio._deprecate import warn_deprecated
 
 if sys.version_info < (3, 11):
-    from exceptiongroup import BaseExceptionGroup, ExceptionGroup, print_exception
-else:
-    from traceback import print_exception
+    from exceptiongroup import BaseExceptionGroup, ExceptionGroup
 
 if TYPE_CHECKING:
     from typing_extensions import Self
@@ -461,37 +459,6 @@ def concat_tb(
     return current_head
 
 
-# Remove when IPython gains support for exception groups
-# (https://github.com/ipython/ipython/issues/13753)
-if "IPython" in sys.modules:
-    import IPython
-
-    ip = IPython.get_ipython()
-    if ip is not None:
-        if ip.custom_exceptions != ():
-            warnings.warn(
-                "IPython detected, but you already have a custom exception "
-                "handler installed. I'll skip installing Trio's custom "
-                "handler, but this means exception groups will not show full "
-                "tracebacks.",
-                category=RuntimeWarning,
-            )
-        else:
-
-            def trio_show_traceback(
-                self: IPython.core.interactiveshell.InteractiveShell,
-                etype: type[BaseException],
-                value: BaseException,
-                tb: TracebackType,
-                tb_offset: int | None = None,
-            ) -> None:
-                # XX it would be better to integrate with IPython's fancy
-                # exception formatting stuff (and not ignore tb_offset)
-                print_exception(value)
-
-            ip.set_custom_exc((BaseExceptionGroup,), trio_show_traceback)
-
-
 # Ubuntu's system Python has a sitecustomize.py file that import
 # apport_python_hook and replaces sys.excepthook.
 #