refactor(data_classes): further remove duplicated code

Manually checked with:

    $ pip install pylint
    $ pylint --disable=all --enable=R0801 --min-similarity-lines=1 aws_lambda_powertools/utilities/data_classes

Author: ericbn

aws_lambda_powertools/utilities/data_classes/vpc_lattice.py

@@ -169,16 +169,6 @@ def version(self) -> str:
         """The VPC Lattice v2 Event version"""
         return self["version"]
 
-    @property
-    def is_base64_encoded(self) -> bool | None:
-        """A boolean flag to indicate if the applicable request payload is Base64-encode"""
-        return self.get("isBase64Encoded")
-
-    @property
-    def path(self) -> str:
-        """The VPC Lattice v2 Event path"""
-        return self["path"]
-
     @property
     def request_context(self) -> vpcLatticeEventV2RequestContext:
         """The VPC Lattice v2 Event request context."""