fix: remove hasattr usage

Signed-off-by: Cole Bailey <cole.bailey@deliveryhero.com>

providers/openfeature-provider-flagd/src/openfeature/contrib/provider/flagd/provider.py

@@ -82,8 +82,7 @@ def setup_resolver(self) -> AbstractResolver:
             )
 
     def initialize(self, evaluation_context: EvaluationContext) -> None:
-        if hasattr(self.resolver, "initialize"):
-            self.resolver.initialize(evaluation_context)
+        self.resolver.initialize(evaluation_context)
 
     def shutdown(self) -> None:
         if self.resolver:

providers/openfeature-provider-flagd/src/openfeature/contrib/provider/flagd/resolvers/__init__.py

@@ -10,6 +10,9 @@
 
 
 class AbstractResolver(Protocol):
+    def initialize(self, evaluation_context: EvaluationContext) -> None:
+        return
+
     def shutdown(self) -> None: ...
 
     def resolve_boolean_details(

providers/openfeature-provider-flagd/src/openfeature/contrib/provider/flagd/resolvers/grpc.py

@@ -16,11 +16,12 @@
 from ..config import Config
 from ..flag_type import FlagType
 from ..proto.schema.v1 import schema_pb2, schema_pb2_grpc
+from . import AbstractResolver
 
 T = typing.TypeVar("T")
 
 
-class GrpcResolver:
+class GrpcResolver(AbstractResolver):
     def __init__(self, config: Config):
         self.config = config
         channel_factory = (