Remove mention of old bots in generate_perf.py

BUG=316203

Review URL: https://codereview.chromium.org/223843003

git-svn-id: svn://svn.chromium.org/chrome/trunk/tools/perf@262721 0039d316-1c4b-4281-b951-d872f2087c98
diff --git a/generate_perf.py b/generate_perf.py
index 9da93fb..c62c6b2 100755
--- a/generate_perf.py
+++ b/generate_perf.py
@@ -60,7 +60,6 @@
   'linux-release-fyi': 'Chromium Linux FYI',
   'linux-release-hardy': 'Linux Perf',
   'linux-release-lowmem': 'Linux Perf (lowmem)',
-  'linux-release-memory': 'Chromium Linux Memory',
   'linux-release-webkit-latest': 'Linux Perf (webkit-latest)',
   'linux-targets': 'Linux Target Builds',
   'lumpy-chrome-perf': 'Lumpy (perf)',
@@ -72,7 +71,6 @@
   'mac-release-10.6': 'Mac 10.6 Perf',
   'mac-release-10.6-v8-latest': 'Chromium Mac 10.6 (v8-latest)',
   'mac-release-10.6-webkit-latest': 'Mac 10.6 Perf (webkit-latest)',
-  'mac-release-memory': 'Chromium Mac Memory',
   'mac-release-old-10.6': 'Old Mac 10.6 Perf',
   'mac-targets': 'Mac Target Builds',
   'nacl-lucid-32-bare-glibc-opt': 'NaCl Lucid32 Bare Glibc Opt',