Fix incorrect usage of AnyStr (#1215)

* Fix incorrect usage of AnyStr

- sqlite3 was using Union[bytes, AnyStr], which doesn't make sense
- The urllib functions I changed accept either bytes or str for their "safe"
  argument
- Also added supports for PathLike to pstats
- Remove some unused imports of AnyStr

* pstats: python 2 accepts unicode

stdlib/3/urllib/parse.pyi

@@ -2,6 +2,8 @@
 from typing import Any, List, Dict, Tuple, AnyStr, Generic, overload, Sequence, Mapping, Union, NamedTuple, Callable
 import sys
 
+_Str = Union[bytes, str]
+
 __all__ = (
     'urlparse',
     'urlunparse',
@@ -103,20 +105,20 @@ def parse_qsl(qs: AnyStr, keep_blank_values: bool = ..., strict_parsing: bool =
 
 
 @overload
-def quote(string: str, safe: AnyStr = ..., encoding: str = ..., errors: str = ...) -> str: ...
+def quote(string: str, safe: _Str = ..., encoding: str = ..., errors: str = ...) -> str: ...
 @overload
-def quote(string: bytes, safe: AnyStr = ...) -> str: ...
+def quote(string: bytes, safe: _Str = ...) -> str: ...
 
-def quote_from_bytes(bs: bytes, safe: AnyStr = ...) -> str: ...
+def quote_from_bytes(bs: bytes, safe: _Str = ...) -> str: ...
 
 @overload
-def quote_plus(string: str, safe: AnyStr = ..., encoding: str = ..., errors: str = ...) -> str: ...
+def quote_plus(string: str, safe: _Str = ..., encoding: str = ..., errors: str = ...) -> str: ...
 @overload
-def quote_plus(string: bytes, safe: AnyStr = ...) -> str: ...
+def quote_plus(string: bytes, safe: _Str = ...) -> str: ...
 
 def unquote(string: str, encoding: str = ..., errors: str = ...) -> str: ...
 
-def unquote_to_bytes(string: AnyStr) -> bytes: ...
+def unquote_to_bytes(string: _Str) -> bytes: ...
 
 def unquote_plus(string: str, encoding: str = ..., errors: str = ...) -> str: ...