spigotmc fix UnicodeDecodeError (#5598)

<!--
Describe the change in summary section, including rationale and degin decisions.
Include "Fixes #nnn" if you are fixing an existing issue.

In "Component Name" section write which component is changed in this PR. This
will help us review your PR quicker.

If you have more information you want to add, write them in "Additional
Information" section. This is usually used to help others understand your
motivation behind this change. A step-by-step reproduction of the problem is
helpful if there is no related issue.
-->

##### Summary

Fix [UnicodeDecodeError](https://github.com/netdata/netdata/pull/5507#issuecomment-471344661)

##### Component Name
[`collectors/python.d.plugin/spigotmc`](https://github.com/netdata/netdata/tree/master/collectors/python.d.plugin/spigotmc)
##### Additional Information

1 files changed, 0 insertions, 3 deletions

diff --git a/collectors/python.d.plugin/spigotmc/spigotmc.chart.py b/collectors/python.d.plugin/spigotmc/spigotmc.chart.py
index 16b9d12ea2..536fbe6a89 100644
--- a/collectors/python.d.plugin/spigotmc/spigotmc.chart.py
+++ b/collectors/python.d.plugin/spigotmc/spigotmc.chart.py
@@ -116,7 +116,6 @@ class Service(SimpleService):
 
         try:
             raw = self.console.command(COMMAND_TPS)
-            self.debug("'{0}' command output : {1}".format(COMMAND_TPS, raw))
             match = _TPS_REGEX.match(raw)
             if match:
                 data['tps1'] = int(float(match.group(1)) * PRECISION)
@@ -135,11 +134,9 @@ class Service(SimpleService):
 
         try:
             raw = self.console.command(COMMAND_LIST)
-            self.debug("'{0}' command output : {1}".format(COMMAND_LIST, raw))
             match = _LIST_REGEX.search(raw)
             if not match:
                 raw = self.console.command(COMMAND_ONLINE)
-                self.debug("'{0}' command output : {1}".format(COMMAND_ONLINE, raw))
                 match = _LIST_REGEX.search(raw)
             if match:
                 data['users'] = int(match.group(1))