Revert "gh-130804: Fix support of typing unicode chars in pyrepl (#130805)"

This reverts commit 7c98b06.

Author: chris-eibl

Lib/_pyrepl/base_eventqueue.py

@@ -69,19 +69,13 @@ def insert(self, event: Event) -> None:
         trace('added event {event}', event=event)
         self.events.append(event)
 
-    def push(self, char: int | bytes | str) -> None:
+    def push(self, char: int | bytes) -> None:
         """
         Processes a character by updating the buffer and handling special key mappings.
         """
         ord_char = char if isinstance(char, int) else ord(char)
-        if ord_char > 255:
-            assert isinstance(char, str)
-            char = bytes(char.encode(self.encoding, "replace"))
-            self.buf.extend(char)
-        else:
-            char = bytes(bytearray((ord_char,)))
-            self.buf.append(ord_char)
-
+        char = bytes(bytearray((ord_char,)))
+        self.buf.append(ord_char)
         if char in self.keymap:
             if self.keymap is self.compiled_keymap:
                 # sanity check, buffer is empty when a special key comes

Lib/test/test_pyrepl/test_eventqueue.py

@@ -122,13 +122,6 @@ def test_push_unrecognized_escape_sequence(self):
         self.assertEqual(eq.events[2].evt, "key")
         self.assertEqual(eq.events[2].data, "Z")
 
-    def test_push_unicode_character(self):
-        eq = self.make_eventqueue()
-        eq.keymap = {}
-        eq.push("ч")
-        self.assertEqual(eq.events[0].evt, "key")
-        self.assertEqual(eq.events[0].data, "ч")
-
 
 @unittest.skipIf(support.MS_WINDOWS, "No Unix event queue on Windows")
 class TestUnixEventQueue(EventQueueTestBase, unittest.TestCase):