remove checks against patch versions (#987)

Both mypy and pytype only use the major and minor version in type checking. Using
checks like "sys.version_info >= (3, 4, 4)" won't actually work properly for
people type checking their code using version 3.4, because (3, 4) >= (3, 4, 4) will
always be false (at least in mypy's approach; not sure if pytype is different).

Author: JelleZijlstra

stdlib/2and3/asynchat.pyi

@@ -31,7 +31,7 @@ class async_chat (asyncore.dispatcher):
     def initiate_send(self) -> None: ...
     def discard_buffers(self) -> None: ...
 
-if sys.version_info < (3, 0, 0):
+if sys.version_info < (3, 0):
     class fifo:
         def __init__(self, list: Sequence[Union[str, simple_producer]] = ...) -> None: ...
         def __len__(self) -> int: ...

stdlib/3/email/message.pyi

@@ -118,7 +118,7 @@ class MIMEPart:
                         **kw: Any) -> None: ...
     def clear(self) -> None: ...
     def clear_content(self) -> None: ...
-    if sys.version_info >= (3, 4, 2):
+    if sys.version_info >= (3, 4):
         def is_attachment(self) -> bool: ...
     else:
         @property

stdlib/3/ssl.pyi

@@ -46,7 +46,6 @@ if sys.version_info >= (3, 4):
                                capath: Optional[str] = ...,
                                cadata: Optional[str] = ...) -> 'SSLContext': ...
 
-if sys.version_info >= (3, 4, 3):
     def _create_unverified_context(protocol: int = ..., *,
                                    cert_reqs: int = ...,
                                    check_hostname: bool = ...,
@@ -94,7 +93,6 @@ if sys.version_info >= (3, 4):
     VERIFY_CRL_CHECK_LEAF = ...  # type: int
     VERIFY_CRL_CHECK_CHAIN = ...  # type: int
     VERIFY_X509_STRICT = ...  # type: int
-if sys.version_info >= (3, 4, 4):
     VERIFY_X509_TRUSTED_FIRST = ...  # type: int
 
 PROTOCOL_SSLv23 = ...  # type: int