tests/basics: Remove __index__ and __inv__ from special methods tests.

MicroPython does not support these special methods, and they may get in the
way of other tests (eg indexing with __int__).

Signed-off-by: Damien George <damien@micropython.org>

tests/basics/special_methods.py

@@ -37,12 +37,6 @@ class Cud():
     def __floordiv__(self, other):
         print("__floordiv__ called")
 
-    def __index__(self, other):
-        print("__index__ called")
-
-    def __inv__(self):
-        print("__inv__ called")
-
     def __invert__(self):
         print("__invert__ called")
 

tests/basics/special_methods2.py

@@ -38,12 +38,6 @@ class Cud():
     def __floordiv__(self, other):
         print("__floordiv__ called")
 
-    def __index__(self, other):
-        print("__index__ called")
-
-    def __inv__(self):
-        print("__inv__ called")
-
     def __invert__(self):
         print("__invert__ called")