Remove last traces of old ANGLE Linux and Mac bots.

Were missed from a couple places in luci-milo.cfg.

Bug: 822310
Tbr: jbudorick@chromium.org
Change-Id: I3bc20f71e6fa5ea378c6b476e10c2ea83429aa56
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/1566116Reviewed-by: Jamie Madill <jmadill@chromium.org>
Reviewed-by: Yuly Novikov <ynovikov@chromium.org>
Commit-Queue: Jamie Madill <jmadill@chromium.org>
Cr-Commit-Position: refs/heads/master@{#650425}

infra/config/luci-milo.cfg

@@ -4831,9 +4831,6 @@ consoles {
   builders {
     name: "buildbucket/luci.chromium.try/linux_angle_ozone_rel_ng"
   }
-  builders {
-    name: "buildbucket/luci.chromium.try/linux_angle_rel_ng"
-  }
   builders {
     name: "buildbucket/luci.chromium.try/linux_arm"
   }
@@ -4952,9 +4949,6 @@ consoles {
   builders {
     name: "buildbucket/luci.chromium.try/mac_angle_dbg_ng"
   }
-  builders {
-    name: "buildbucket/luci.chromium.try/mac_angle_rel_ng"
-  }
   builders {
     name: "buildbucket/luci.chromium.try/mac_chromium_10.10_macviews"
   }