Remove stale mentions of mandoline.

WATCHLISTS

Index: WATCHLISTS
diff --git a/WATCHLISTS b/WATCHLISTS
index 0932de7e74ebfc4f6a5c69616f2b7f366ea7b28a..4eba6123166cdb289c8ce657614f82e6f26bb7e3 100644
--- a/WATCHLISTS
+++ b/WATCHLISTS
@@ -471,9 +471,6 @@
     'linux_seccomp_bpf': {
       'filepath': 'content/common/sandbox.*linux.cc',
     },
-    'mandoline': {
-      'filepath': 'mandoline',
-    },
     'manifest': {
       'filepath': 'content/(browser|renderer)/manifest/'\
                   '|content/public/common/manifest*',
@@ -1396,9 +1393,6 @@
     'linux_sandboxing': ['jln+watch@chromium.org'],
     'linux_seccomp_bpf': ['jln+watch@chromium.org'],
     'supervised_users': ['pam+watch@chromium.org'],
-    'mandoline': ['yzshen+watch@chromium.org',
-                  'penghuang+watch-mandoline@chromium.org',
-                  'rjkroege@chromium.org'],
     'manifest': ['mlamouri+watch-manifest@chromium.org'],
     'md_settings': ['dbeam+watch-settings@chromium.org',
                     'michaelpg+watch-md-settings@chromium.org',