fix email.mime (#1482)

* add missing python 2 email.mime.application stub

* restore missing python 3 mime package

* Delete __init__.py

stdlib/2/email/mime/application.pyi

@@ -0,0 +1,11 @@
+# Stubs for email.mime.application
+
+from typing import Callable, Optional, Tuple, Union
+from email.mime.nonmultipart import MIMENonMultipart
+
+_ParamsType = Union[str, None, Tuple[str, Optional[str], str]]
+
+class MIMEApplication(MIMENonMultipart):
+    def __init__(self, _data: bytes, _subtype: str = ...,
+                 _encoder: Callable[[MIMEApplication], None] = ...,
+                 **_params: _ParamsType) -> None: ...