Remove unused perf bots from the Chromium Mojo FYI waterfall.

tools/mb/mb_config.pyl

 # Copyright 2015 The Chromium Authors. All rights reserved.
 # Use of this source code is governed by a BSD-style license that can be
 # found in the LICENSE file.
 
 {
   # This is the list of configs that you can pass to mb; each config
   # represents a particular combination of GYP_DEFINES/gn args that
   # we must support. A given config *may* be platform-specific but
   # is not necessarily so (i.e., we might have mac, win, and linux
   # bots all using the 'gn_release_bot' config).
@@ skipping 507 matching lines @@
       'Android GN': 'android_gn_release_bot',
       'Android GN (dbg)': 'android_gn_debug_bot',
       'Cast Android (dbg)': 'android_cast_gyp_debug_static_bot',
     },
     'chromium.mac': {
       'Mac GN': 'gn_release_bot',
       'Mac GN (dbg)': 'gn_debug_static_bot',
     },
     'chromium.mojo': {
       'Chromium Mojo Android': 'android_gn_release_bot',
-      'Chromium Mojo Linux Perf': 'gn_release_bot',
-      'Chromium Mojo Android Nexus5 Perf': 'android_gn_release_bot',
       'Chromium Mojo Windows': 'gn_release_bot_minimal_symbols_x86',
       'Chromium Mojo Linux': 'gn_release_bot',
-      'Chromium Mojo Windows 7 Perf': 'gn_release_bot_minimal_symbols_x86',
     },
     'chromium.perf': {
       'Android Builder': 'gn_official_goma_minimal_symbols_android',
       'Android arm64 Builder': 'gn_official_goma_minimal_symbols_android_arm64',
       'Win Builder': 'gyp_official_goma_minimal_symbols_x86',
       'Win x64 Builder': 'gyp_official_goma_minimal_symbols_x64',
       'Mac Builder': 'gyp_official_goma',
       'Linux Builder': 'gn_official_goma',
     },
     'chromium.win': {
@@ skipping 252 matching lines @@
       'win8_chromium_gn_upload': 'gn_release_bot_minimal_symbols_x86',
       'win_clang_x64_dbg': 'win_clang_debug_bot',
     },
     'tryserver.v8': {
       'v8_linux_chromium_gn_rel': 'gn_release_trybot',
       'v8_android_chromium_gn_dbg': 'android_gn_debug_bot',
       'v8_linux_blink_rel': 'swarming_gn_release_trybot_minimal_symbols_x64',
     },
   },
 }