Make mautrix-signal bridge not log to files

We try to only use console logging (going to journald) for everything,
instead of logging things twice (or more).

roles/matrix-bridge-mautrix-signal/templates/config.yaml.j2

@@ -189,12 +189,6 @@ logging:
         normal:
             format: "[%(asctime)s] [%(levelname)s@%(name)s] %(message)s"
     handlers:
-        file:
-            class: logging.handlers.RotatingFileHandler
-            formatter: normal
-            filename: ./mautrix-signal.log
-            maxBytes: 10485760
-            backupCount: 10
         console:
             class: logging.StreamHandler
             formatter: colored
@@ -205,4 +199,4 @@ logging:
             level: INFO
     root:
         level: {{ matrix_mautrix_signal_log_level }}
-        handlers: [file, console]
+        handlers: [console]