Remove unused imports and dead code

- mux.py: drop unused `sys`, `os`
- scan.py: drop unused `sys`
- probe.py: drop unused `pprint`
- cli.py: remove never-used `debug = False` variable
- cli.py: remove `del args` / `del parser` (unnecessary manual cleanup)
- scan.py: remove `del m` after regex match (unnecessary)

zz_remux/zz_remux/cli.py

@@ -4,7 +4,6 @@ import zz_remux as remux
 
 def main():
   # Static config
-  debug     = False
   log_level = logging.WARN
   prog_name = 'zz_remux'
 
@@ -57,9 +56,6 @@ def main():
   if args.no_recursion:
     recurse = False
 
-  del args
-  del parser
-
   # Logging
   logging.basicConfig(stream=sys.stderr)
   logger = logging.getLogger(prog_name)

zz_remux/zz_remux/mux.py

@@ -1,4 +1,4 @@
-import sys, os, pathlib, logging
+import pathlib, logging
 from .consts import Consts
 from .tag import Tag
 from .proc import Proc

zz_remux/zz_remux/probe.py

@@ -1,5 +1,4 @@
 import json, logging
-import pprint
 from .proc import Proc
 
 class Probe:

zz_remux/zz_remux/scan.py

@@ -1,4 +1,4 @@
-import sys, re, pathlib, logging
+import re, pathlib, logging
 import langcodes
 from .consts import Consts
 from .tag import Tag
@@ -52,7 +52,6 @@ class Scan:
           info['sdh'] = m.group(3).lower() in Consts.subs_sdh
 
         info['ext'] = m.group(4).lower()
-      del m
 
       # Skip non-media files (and parsing errors)
       if not info['ext']: