Revert "Allow setting of log level in config file"

Scott encountered a failure with this patch. Even though not in master,
it merits reverting to avert the possibility of instability during ONS.
We will recommit this in 1 week.

This reverts commit 9db725ac85631a479c9ea69f536ec501aa8a2c6f.

Change-Id: Ifb76c4218cda7379bdc0f016b665ce940462cdbd
diff --git a/xos/xos/logger.py b/xos/xos/logger.py
index 7ebf87c..1f57a4a 100644
--- a/xos/xos/logger.py
+++ b/xos/xos/logger.py
@@ -44,22 +44,14 @@
 class Logger:
 
     def __init__(self, logfile=None, loggername=None, level=logging.INFO):
-        logstash_level = logging.DEBUG
-        try:
-            config_level = Config().observer_log_level
-            if (config_level):
-                level = getattr(logging, config_level)
-                logstash_level = getattr(logging, config_level)
-        except:
-            pass
 
         # Logstash config - try as specified explicitly in config
         try:
             logstash_host, logstash_port = Config().observer_logstash_hostport.split(':')
             logstash_handler = logstash.LogstashHandler(
                 logstash_host, int(logstash_port), version=1)
-
-            logstash_handler.setLevel(logstash_level)
+            # always log at DEBUG level to logstash
+            logstash_handler.setLevel(logging.DEBUG)
         except:
             logstash_handler = None
 
@@ -69,7 +61,7 @@
                 logstash_handler = logstash.LogstashHandler(
                     "cordloghost", 5617, version=1)
                 # always log at DEBUG level to logstash
-                logstash_handler.setLevel(logstash_level)
+                logstash_handler.setLevel(logging.DEBUG)
             except:
                 logstash_handler = None