refactor: simplify hyperopt-auto

Author: xmatthias

freqtrade/optimize/hyperopt/hyperopt_auto.py

@@ -62,20 +62,18 @@ def _get_func(self, name) -> Callable:
         else:
             return default_func
 
-    def _generate_indicator_space(self, category):
-        for attr_name, attr in self.strategy.enumerate_parameters(category):
-            if attr.optimize:
-                yield attr.get_space(attr_name)
-
     def get_indicator_space(
         self, category: Literal["buy", "sell", "enter", "exit", "protection"] | str
     ) -> list:
         """
         Get indicator space for a given space.
         :param category: parameter space to get.
         """
-        # TODO: is this necessary, or can we call "generate_space" directly?
-        indicator_space = list(self._generate_indicator_space(category))
+        indicator_space = [
+            attr.get_space(attr_name)
+            for attr_name, attr in self.strategy.enumerate_parameters(category)
+            if attr.optimize
+        ]
         if len(indicator_space) > 0:
             return indicator_space
         else: