Remove Python 3.6 branches from typeshed (#8269)

stdlib/uuid.pyi

@@ -1,4 +1,4 @@
-import sys
+from enum import Enum
 from typing_extensions import TypeAlias
 
 # Because UUID has properties called int and bytes we need to rename these temporarily.
@@ -6,40 +6,25 @@ _Int: TypeAlias = int
 _Bytes: TypeAlias = bytes
 _FieldsType: TypeAlias = tuple[int, int, int, int, int, int]
 
-if sys.version_info >= (3, 7):
-    from enum import Enum
-
-    class SafeUUID(Enum):
-        safe: int
-        unsafe: int
-        unknown: None
+class SafeUUID(Enum):
+    safe: int
+    unsafe: int
+    unknown: None
 
 class UUID:
-    if sys.version_info >= (3, 7):
-        def __init__(
-            self,
-            hex: str | None = ...,
-            bytes: _Bytes | None = ...,
-            bytes_le: _Bytes | None = ...,
-            fields: _FieldsType | None = ...,
-            int: _Int | None = ...,
-            version: _Int | None = ...,
-            *,
-            is_safe: SafeUUID = ...,
-        ) -> None: ...
-        @property
-        def is_safe(self) -> SafeUUID: ...
-    else:
-        def __init__(
-            self,
-            hex: str | None = ...,
-            bytes: _Bytes | None = ...,
-            bytes_le: _Bytes | None = ...,
-            fields: _FieldsType | None = ...,
-            int: _Int | None = ...,
-            version: _Int | None = ...,
-        ) -> None: ...
-
+    def __init__(
+        self,
+        hex: str | None = ...,
+        bytes: _Bytes | None = ...,
+        bytes_le: _Bytes | None = ...,
+        fields: _FieldsType | None = ...,
+        int: _Int | None = ...,
+        version: _Int | None = ...,
+        *,
+        is_safe: SafeUUID = ...,
+    ) -> None: ...
+    @property
+    def is_safe(self) -> SafeUUID: ...
     @property
     def bytes(self) -> _Bytes: ...
     @property