Don't test AST for backticks.

Lib/test/test_ast.py

@@ -94,8 +94,6 @@ eval_tests = [
   "1 < 2 < 3",
   # Call
   "f(1,2,c=3,*d,**e)",
-  # Repr
-  "`v`",
   # Num
   "10L",
   # Str
@@ -191,7 +189,6 @@ eval_results = [
 ('Expression', ('GeneratorExp', (1, 1), ('Name', (1, 1), 'a', ('Load',)), [('comprehension', ('Name', (1, 7), 'b', ('Store',)), ('Name', (1, 12), 'c', ('Load',)), [('Name', (1, 17), 'd', ('Load',))])])),
 ('Expression', ('Compare', (1, 0), ('Num', (1, 0), 1), [('Lt',), ('Lt',)], [('Num', (1, 4), 2), ('Num', (1, 8), 3)])),
 ('Expression', ('Call', (1, 0), ('Name', (1, 0), 'f', ('Load',)), [('Num', (1, 2), 1), ('Num', (1, 4), 2)], [('keyword', 'c', ('Num', (1, 8), 3))], ('Name', (1, 11), 'd', ('Load',)), ('Name', (1, 15), 'e', ('Load',)))),
-('Expression', ('Repr', (1, 0), ('Name', (1, 1), 'v', ('Load',)))),
 ('Expression', ('Num', (1, 0), 10L)),
 ('Expression', ('Str', (1, 0), 'string')),
 ('Expression', ('Attribute', (1, 0), ('Name', (1, 0), 'a', ('Load',)), 'b', ('Load',))),