Simplify the container_ overrides

Author: humitos

readthedocs/doc_builder/environments.py

@@ -580,8 +580,6 @@ class DockerBuildEnvironment(BaseBuildEnvironment):
 
     command_class = DockerBuildCommand
     container_image = DOCKER_IMAGE
-    container_mem_limit = settings.BUILD_MEMORY_LIMIT
-    container_time_limit = settings.BUILD_TIME_LIMIT
 
     def __init__(self, *args, **kwargs):
         container_image = kwargs.pop("container_image", None)
@@ -608,10 +606,8 @@ def __init__(self, *args, **kwargs):
         if container_image:
             self.container_image = container_image
 
-        if self.project.container_mem_limit:
-            self.container_mem_limit = self.project.container_mem_limit
-        if self.project.container_time_limit:
-            self.container_time_limit = self.project.container_time_limit
+        self.container_mem_limit = self.project.container_mem_limit or settings.BUILD_MEMORY_LIMIT
+        self.container_time_limit = self.project.container_time_limit or settings.BUILD_TIME_LIMIT
 
         structlog.contextvars.bind_contextvars(
             project_slug=self.project.slug,