Revert "avocado.core.sysinfo: Force LANG for sysinfo collection"

This reverts commit 6cb88049.

The rationale is that we should really use LC_ALL instead of LANG.

avocado/core/sysinfo.py

@@ -151,9 +151,6 @@ class Command(Collectible):
         env = os.environ.copy()
         if "PATH" not in env:
             env["PATH"] = "/usr/bin:/bin"
-        lang = settings.get_value("sysinfo.collect", "lang", str, None)
-        if lang:
-            env["LANG"] = lang
         logf_path = os.path.join(logdir, self.logf)
         stdin = open(os.devnull, "r")
         stdout = open(logf_path, "w")
@@ -188,9 +185,6 @@ class Daemon(Command):
         env = os.environ.copy()
         if "PATH" not in env:
             env["PATH"] = "/usr/bin:/bin"
-        lang = settings.get_value("sysinfo.collect", "lang", str, None)
-        if lang:
-            env["LANG"] = lang
         logf_path = os.path.join(logdir, self.logf)
         stdin = open(os.devnull, "r")
         stdout = open(logf_path, "w")

etc/avocado/avocado.conf

@@ -19,8 +19,6 @@ enabled = True
 installed_packages = False
 # Whether to run certain commands in bg to give extra job debug information
 profiler = False
-# Force LANG for sysinfo collection
-lang = C
 
 [sysinfo.collectibles]
 # File with list of commands that will be executed and have their output collected