Remove unnecessary __ne__ fallbacks

Such a fallback is already implicitly provided by Python since 3.0

https://docs.python.org/3/reference/datamodel.html#object.__ne__

PiperOrigin-RevId: 690592635

build_scripts/build_utils.py

@@ -43,16 +43,10 @@ def save_to_cache_file(self):
       )
 
   def __eq__(self, other):
-    return all([
-        self.py_version == other.py_version,
-        self.build_type == other.build_type,
-    ])
-
-  def __ne__(self, other):
-    return any([
-        self.py_version != other.py_version,
-        self.build_type != other.build_type,
-    ])
+    return (
+        self.py_version == other.py_version
+        and self.build_type == other.build_type
+    )
 
   @classmethod
   def current_build_config(cls, debug):

pytype/abstract/_classes.py

@@ -785,9 +785,6 @@ def __eq__(self, other: "ParameterizedClass") -> bool:
       )
     return NotImplemented
 
-  def __ne__(self, other: "ParameterizedClass") -> bool:
-    return not self == other
-
   def __hash__(self):
     if self._hash is None:
       if isinstance(

pytype/abstract/_typing.py

@@ -542,9 +542,6 @@ def __eq__(self, other: "_TypeVariable") -> bool:
       )
     return NotImplemented
 
-  def __ne__(self, other: "_TypeVariable") -> bool:
-    return not self == other
-
   def __hash__(self) -> int:
     return hash((
         self.name,
@@ -710,9 +707,6 @@ def __eq__(self, other: "Union") -> bool:
       return self.options == other.options
     return NotImplemented
 
-  def __ne__(self, other: "Union") -> bool:
-    return not self == other
-
   def __hash__(self) -> int:
     # Use the names of the parameter values to approximate a hash, to avoid
     # infinite recursion on recursive type annotations.

pytype/pytd/booleq.py

@@ -170,9 +170,6 @@ def __eq__(self, other):
         and self.right == other.right
     )
 
-  def __ne__(self, other):
-    return not self == other
-
   def simplify(self, assignments):
     """Simplify this equality.
 
@@ -236,9 +233,6 @@ def __init__(self, exprs):
   def __eq__(self, other):
     return self.__class__ == other.__class__ and self.exprs == other.exprs
 
-  def __ne__(self, other):
-    return not self == other
-
   def __repr__(self):
     return f"And({list(self.exprs)!r})"
 
@@ -288,9 +282,6 @@ def __init__(self, exprs):
   def __eq__(self, other):  # for unit tests
     return self.__class__ == other.__class__ and self.exprs == other.exprs
 
-  def __ne__(self, other):
-    return not self == other
-
   def __repr__(self):
     return f"Or({list(self.exprs)!r})"
 

pytype/pytd/pytd.py

@@ -562,9 +562,6 @@ def __eq__(self, other):
       return frozenset(self.type_list) == frozenset(other.type_list)
     return NotImplemented
 
-  def __ne__(self, other):
-    return not self == other
-
   def __hash__(self):
     return hash(self.type_list)