UNARY_CONVERT can no longer be generated, so remove a test for the peepholer
optimization for it.
diff --git a/Lib/test/test_peepholer.py b/Lib/test/test_peepholer.py
index 4385a84..be7d4e8 100644
--- a/Lib/test/test_peepholer.py
+++ b/Lib/test/test_peepholer.py
@@ -135,7 +135,6 @@
 
     def test_folding_of_unaryops_on_constants(self):
         for line, elem in (
-            ('`1`', "('1')"),                       # unary convert
             ('-0.5', '(-0.5)'),                     # unary negative
             ('~-2', '(1)'),                         # unary invert
         ):