Remove check for rr traceback in stderr logs

This has been moved to FFPuppet.

grizzly/common/report.py

@@ -3,7 +3,6 @@
 # file, You can obtain one at http://mozilla.org/MPL/2.0/.
 from hashlib import sha1
 from logging import getLogger
-from mmap import ACCESS_READ, mmap
 from os import SEEK_END
 from pathlib import Path
 from platform import machine, system
@@ -77,16 +76,6 @@ def __init__(
             for log in log_path.iterdir():
                 if log.is_file() and log.stat().st_size > size_limit:
                     Report.tail(log, size_limit)
-        # check for rr traceback and warn
-        if self._logs.stderr and (log_path / "rr-traces").is_dir():
-            with self._logs.stderr.open("rb") as lfp:
-                try:
-                    with mmap(lfp.fileno(), 0, access=ACCESS_READ) as lmm:
-                        if lmm.find(b"=== Start rr backtrace:") != -1:
-                            LOG.warning("rr traceback detected in stderr log")
-                except ValueError:
-                    # cannot mmap an empty file on Windows
-                    pass
         # look through logs one by one until we find a stack
         for log_file in (x for x in self._logs if x is not None):
             stack = Stack.from_text(log_file.read_text("utf-8", errors="ignore"))

grizzly/common/test_report.py

@@ -412,21 +412,3 @@ def test_report_16(mocker, tmp_path, hang, has_log, expected):
     assert report.short_signature == expected
     if hang:
         assert report.crash_hash == "hang"
-
-
-@mark.parametrize(
-    "log_data",
-    [
-        # empty stderr log
-        b"",
-        # contains rr traceback
-        b"foo\n=== Start rr backtrace:\nfoo",
-        # no traceback
-        b"foo\nfoo",
-    ],
-)
-def test_report_17(tmp_path, log_data):
-    """test Report check for rr traceback"""
-    (tmp_path / "log_stderr.txt").write_bytes(log_data)
-    (tmp_path / "rr-traces").mkdir()
-    assert Report(tmp_path, Path("bin"))