Update manager request function for single provider

web3/manager.py

@@ -80,37 +80,18 @@ def default_middlewares(web3):
     # Provider requests and response
     #
     def _make_request(self, method, params):
-        if self.provider:
-            request_func = self.provider.request_func(self.web3, tuple(self.middleware_stack))
-            self.logger.debug("Making request. Method: %s", method)
-            return request_func(method, params)
-        else:
-            raise UnhandledRequest(
-                "No provider available to respond to the RPC request:\n"
-                "method:{0}\n"
-                "params:{1}\n".format(
-                    method,
-                    params,
-                )
-            )
+        request_func = self.provider.request_func(
+            self.web3,
+            tuple(self.middleware_stack))
+        self.logger.debug("Making request. Method: %s", method)
+        return request_func(method, params)
 
     async def _coro_make_request(self, method, params):
-        for provider in self.providers:
-            request_func = provider.request_func(self.web3, tuple(self.middleware_stack))
-            self.logger.debug("Making request. Method: %s", method)
-            try:
-                return await request_func(method, params)
-            except CannotHandleRequest:
-                continue
-        else:
-            raise UnhandledRequest(
-                "No providers responded to the RPC request:\n"
-                "method:{0}\n"
-                "params:{1}\n".format(
-                    method,
-                    params,
-                )
-            )
+        request_func = self.provider.request_func(
+            self.web3,
+            tuple(self.middleware_stack))
+        self.logger.debug("Making request. Method: %s", method)
+        return await request_func(method, params)
 
     def request_blocking(self, method, params):
         """