chore: update analysis options

Author: robert-virkus

analysis_options.yaml

@@ -8,7 +8,6 @@ linter:
     - always_declare_return_types
     - always_put_control_body_on_new_line
     - always_put_required_named_parameters_first
-    - always_require_non_null_named_parameters
     #- always_specify_types # This would enforce to write types literally everywhere.
     - annotate_overrides
     #- avoid_annotating_with_dynamic # Explicit annotation of dynamic as type is preferable. Also exclusive with type_annotate_public_apis
@@ -30,8 +29,6 @@ linter:
     - avoid_renaming_method_parameters
     - avoid_relative_lib_imports
     - avoid_return_types_on_setters
-    - avoid_returning_null
-    - avoid_returning_null_for_future
     - avoid_returning_null_for_void
     - avoid_returning_this
     - avoid_setters_without_getters