Remove Python 3.4 support (#3147)

Closes #3123

third_party/2and3/boto/utils.pyi

@@ -25,7 +25,7 @@ from typing import (
 _KT = TypeVar('_KT')
 _VT = TypeVar('_VT')
 
-if sys.version_info[0] >= 3:
+if sys.version_info >= (3,):
     # TODO move _StringIO definition into boto.compat once stubs exist and rename to StringIO
     import io
     _StringIO = io.StringIO

third_party/2and3/markupsafe/__init__.pyi

@@ -49,5 +49,5 @@ class EscapeFormatter(string.Formatter):
     def __init__(self, escape: Callable[[text_type], Markup]) -> None: ...
     def format_field(self, value: text_type, format_spec: text_type) -> Markup: ...
 
-if sys.version_info[0] >= 3:
+if sys.version_info >= (3,):
     soft_str = soft_unicode

third_party/2and3/markupsafe/_compat.pyi

@@ -7,7 +7,7 @@ _V = TypeVar('_V')
 
 PY2: bool
 def iteritems(d: Mapping[_K, _V]) -> Iterator[Tuple[_K, _V]]: ...
-if sys.version_info[0] >= 3:
+if sys.version_info >= (3,):
     text_type = str
     string_types = str,
     unichr = chr