ProcessSpec: stop warning about "Process with no parameters"

processes without parameters is not that uncommon in context of proof of
concept custom processes

Author: soxofaan

openeo_driver/processes.py

@@ -64,7 +64,7 @@ def to_dict_040(self) -> dict:
         """Generate process spec as (JSON-able) dictionary (API 0.4.0 style)."""
         # TODO #47 drop this
         if len(self._parameters) == 0:
-            _log.warning("Process with no parameters")
+            _log.debug("Process with no parameters")
         assert self._returns is not None
         return {**self.extra, **{
             "id": self.id,
@@ -80,7 +80,7 @@ def to_dict_040(self) -> dict:
     def to_dict_100(self) -> dict:
         """Generate process spec as (JSON-able) dictionary (API 1.0.0 style)."""
         if len(self._parameters) == 0:
-            _log.warning(f"Process with no parameters: {self.id!r}")
+            _log.debug(f"Process with no parameters: {self.id!r}")
         assert self._returns is not None
         return {**self.extra, **{
             "id": self.id,