Remove wayward "shbangs" in Python 3 library files (#2917)

And we also remove the unnecessary `cli/getconf.py` file.

This work was identified while reviewing PR #2901.

lib/pbench/agent/tool_meister.py

@@ -1,4 +1,3 @@
-#!/usr/bin/env python3
 # -*- mode: python -*-
 
 """pbench-tool-meister

lib/pbench/agent/tool_meister_start.py

@@ -1,4 +1,3 @@
-#!/usr/bin/env python3
 # -*- mode: python -*-
 
 """pbench-tool-meister-start - start the execution of the Tool Meister

lib/pbench/agent/tool_meister_stop.py

@@ -1,4 +1,3 @@
-#!/usr/bin/env python3
 # -*- mode: python -*-
 
 """pbench-tool-meister-stop

lib/pbench/cli/server/shell.py

@@ -1,4 +1,3 @@
-#!/bin/env python3
 from logging import Logger
 import os
 from pathlib import Path

setup.cfg

@@ -27,7 +27,7 @@ console_scripts =
    pbench-cleanup = pbench.cli.agent.commands.cleanup:main
    pbench-clear-results = pbench.cli.agent.commands.results.clear:main
    pbench-clear-tools = pbench.cli.agent.commands.tools.clear:main
-   pbench-config = pbench.cli.getconf:main
+   pbench-config = pbench.common.conf:main
    pbench-tree-manage = pbench.cli.server.tree_manage:tree_manage
    pbench-generate-token = pbench.cli.agent.commands.generate_token:main
    pbench-is-local = pbench.cli.agent.commands.is_local:main