Revert of Enable side-by-side beta and dev channels.

chrome/installer/util/beacons_unittest.cc

Index: chrome/installer/util/beacons_unittest.cc
diff --git a/chrome/installer/util/beacons_unittest.cc b/chrome/installer/util/beacons_unittest.cc
index 4f3e7dc0b3d4b24888c9d1f6caf97a8fb0e5bb89..77d76cc896b37b06348bfe14498fd33489b7c8cf 100644
--- a/chrome/installer/util/beacons_unittest.cc
+++ b/chrome/installer/util/beacons_unittest.cc
@@ -224,18 +224,6 @@
     Stable,
     DefaultBrowserBeaconTest,
     testing::Combine(testing::Values(install_static::STABLE_INDEX),
-                     testing::Values("user", "system")));
-// Beta supports user and system levels.
-INSTANTIATE_TEST_CASE_P(
-    Beta,
-    DefaultBrowserBeaconTest,
-    testing::Combine(testing::Values(install_static::BETA_INDEX),
-                     testing::Values("user", "system")));
-// Dev supports user and system levels.
-INSTANTIATE_TEST_CASE_P(
-    Dev,
-    DefaultBrowserBeaconTest,
-    testing::Combine(testing::Values(install_static::DEV_INDEX),
                      testing::Values("user", "system")));
 // Canary is only at user level.
 INSTANTIATE_TEST_CASE_P(