Revert of Created an empty expectations file to ignore flaky tests

tools/ignorer_bot/ignored_failed_tests.txt

Index: tools/ignorer_bot/ignored_failed_tests.txt
diff --git a/tools/ignorer_bot/ignored_failed_tests.txt b/tools/ignorer_bot/ignored_failed_tests.txt
deleted file mode 100644
index 5031b8ce5023c26d4646fc8a99ebcd8d4e9899e8..0000000000000000000000000000000000000000
--- a/tools/ignorer_bot/ignored_failed_tests.txt
+++ /dev/null
@@ -1,16 +0,0 @@
-# THIS FILE IS GENERATED AUTOMATICALLY BY IGNORER-BOT. PLEASE DO NOT EDIT.
-#
-# This file contains a list of ignored failed tests. Each line that starts with
-# a hash (#) or empty is ignored. Other lines are parsed by the test runner to
-# ignore failures of specified tests on particular platforms. Each such line has
-# the following format:
-#
-#   crbug.com/ISSUE [ PLATFORM1, PLATFORM2, ... ] TESTNAME
-#
-# where
-#  - ISSUE is the id of the associated issue for the flaky test;
-#  - PLATFORM1, PLATFORM2 etc. are each formated as a list of platform flags
-#    separated by whitespace, e.g. "OS_WIN CPU_32_BITS MODE_RELEASE" and limit
-#    on which platforms the test is disabled (note that square brackets and
-#    commas are part of the syntax and do NOT denote this section as optional);
-#  - TESTNAME is a name of the test to be ignored.