!cleanup: Remove unused and confusing GALLIA_LOGLEVEL variable

docs/env.md

@@ -13,13 +13,6 @@ GALLIA_CONFIG
 : The path to the config file usually called `gallia.toml`.
   Disables autodiscovery of the config.
 
-GALLIA_LOGLEVEL
-: When {meth}`gallia.log.setup_logging()` is called without an argument this environment variable is read to set the loglevel.
-  Supported value are: `trace`, `debug`, `info`, `notice`, `warning`, `error`, `critical`.
-  As an alternative, the int values from 0 to 7 can be used.
-  Mostly useful in own scripts or tests.
-  This variable is not read when using the gallia cli.
-
 GALLIA_LOGGING_SYSTEMD
 : Tells gallia to omit colors and status bars in logging output.
   Additionally, the priority information gets added such that the journal can add it.

src/gallia/log.py

@@ -243,18 +243,12 @@ def setup_logging(
     logging.
 
     :param level: The loglevel to enable for the console handler.
-                  If this argument is None, the env variable
-                  ``GALLIA_LOGLEVEL`` (see :doc:`../env`) is read.
     :param file_level: The loglevel to enable for the file handler.
     :param path: The path to the logfile containing json records.
     :param color_mode: The color mode to use for the console.
     """
     if level is None:
-        # FIXME why is this here and not in config?
-        if (raw := os.getenv("GALLIA_LOGLEVEL")) is not None:
-            level = PenlogPriority.from_str(raw).to_level()
-        else:
-            level = Loglevel.DEBUG
+        level = Loglevel.DEBUG
 
     # These are slow and not used by gallia.
     logging.logMultiprocessing = False