Issue #24245: Eliminated senseless expect clauses that have no any effect in
IDLE.  Patch by Martin Panter.
diff --git a/Lib/idlelib/idle.pyw b/Lib/idlelib/idle.pyw
index 537dd5a..9ce4c9f 100644
--- a/Lib/idlelib/idle.pyw
+++ b/Lib/idlelib/idle.pyw
@@ -2,20 +2,16 @@
     import idlelib.PyShell
 except ImportError:
     # IDLE is not installed, but maybe PyShell is on sys.path:
-    try:
-        import PyShell
-    except ImportError:
-        raise
-    else:
-        import os
-        idledir = os.path.dirname(os.path.abspath(PyShell.__file__))
-        if idledir != os.getcwd():
-            # We're not in the IDLE directory, help the subprocess find run.py
-            pypath = os.environ.get('PYTHONPATH', '')
-            if pypath:
-                os.environ['PYTHONPATH'] = pypath + ':' + idledir
-            else:
-                os.environ['PYTHONPATH'] = idledir
-        PyShell.main()
+    import PyShell
+    import os
+    idledir = os.path.dirname(os.path.abspath(PyShell.__file__))
+    if idledir != os.getcwd():
+        # We're not in the IDLE directory, help the subprocess find run.py
+        pypath = os.environ.get('PYTHONPATH', '')
+        if pypath:
+            os.environ['PYTHONPATH'] = pypath + ':' + idledir
+        else:
+            os.environ['PYTHONPATH'] = idledir
+    PyShell.main()
 else:
     idlelib.PyShell.main()