Remove outdated logging configuration from Dimension

Related to https://github.com/turt2live/matrix-dimension/commit/123a45bb217126875a5a9aaabbe22c5f8f66727a

Provoked by https://github.com/spantaleev/matrix-docker-ansible-deploy/issues/1879

Not sure how bot-sdk's logging level can be adjusted. Seems like
Dimension now hardcodes `LogService.setLevel(LogLevel.DEBUG);` in its
startup code.

roles/matrix-dimension/templates/config.yaml.j2

@@ -73,13 +73,3 @@ dimension:
   # This is where Dimension is accessible from clients. Be sure to set this
   # to your own Dimension instance.
   publicUrl: "https://{{ matrix_server_fqn_dimension }}"
-
-# Settings for controlling how logging works
-logging:
-  file: /dev/null
-  console: true
-  consoleLevel: verbose
-  fileLevel: info
-  rotate:
-    size: 52428800 # bytes, default is 50mb
-    count: 5