feat: make return value not optional in provider API functions

Signed-off-by: Federico Bond <federicobond@gmail.com>

openfeature/api.py

@@ -31,12 +31,12 @@ def set_provider(provider: FeatureProvider) -> None:
     provider.initialize(_evaluation_context)
 
 
-def get_provider() -> typing.Optional[FeatureProvider]:
+def get_provider() -> FeatureProvider:
     global _provider
     return _provider
 
 
-def get_provider_metadata() -> typing.Optional[Metadata]:
+def get_provider_metadata() -> Metadata:
     global _provider
     return _provider.get_metadata()
 

openfeature/client.py

@@ -25,7 +25,6 @@
     error_hooks,
 )
 from openfeature.provider import FeatureProvider
-from openfeature.provider.no_op_provider import NoOpProvider
 
 logger = logging.getLogger("openfeature")
 
@@ -374,10 +373,6 @@ def _create_provider_evaluation(
             evaluation_context,
         )
 
-        if not self.provider:
-            logger.info("No provider configured, using no-op provider.")
-            self.provider = NoOpProvider()
-
         get_details_callables: typing.Mapping[FlagType, GetDetailCallable] = {
             FlagType.BOOLEAN: self.provider.resolve_boolean_details,
             FlagType.INTEGER: self.provider.resolve_integer_details,