Revert "Merge pull request NixOS#96152 from JJJollyjim/colour-test-ma…

…chines-staging"

This reverts commit 1bff6fe, reversing
changes made to 2995fa4.

There’s presumably nothing wrong with this PR, except that it
conflicts with reverting NixOS#96254 which broke several tests (NixOS#96699).

Signed-off-by: Anders Kaseorg <andersk@mit.edu>

nixos/lib/test-driver/test-driver.py

@@ -3,7 +3,6 @@
 import atexit
 import base64
 import io
-import itertools
 import logging
 import os
 import pathlib
@@ -93,17 +92,10 @@
 logger = logging.getLogger("test-driver")
 logger.setLevel(logging.INFO)
 
-machine_colours_iter = (
-    "\x1b[{}m".format(x) for x in itertools.cycle(reversed(range(31, 37)))
-)
-
 
 class MachineLogAdapter(logging.LoggerAdapter):
     def process(self, msg: str, kwargs: Any) -> Tuple[str, Any]:
-        return (
-            f"{self.extra['colour_code']}{self.extra['machine']}\x1b[39m: {msg}",
-            kwargs,
-        )
+        return f"{self.extra['machine']}: {msg}", kwargs
 
 
 def make_command(args: list) -> str:
@@ -180,10 +172,7 @@ def create_dir(name: str) -> str:
         self.socket = None
         self.monitor: Optional[socket.socket] = None
         self.allow_reboot = args.get("allowReboot", False)
-        self.logger = MachineLogAdapter(
-            logger,
-            extra=dict(machine=self.name, colour_code=next(machine_colours_iter)),
-        )
+        self.logger = MachineLogAdapter(logger, extra=dict(machine=self.name))
 
     @staticmethod
     def create_startcommand(args: Dict[str, str]) -> str: