devserver: re-enabling latestbuild rpc for cr50tot test

Cr50TOT test depends on the xbuddy_translate RPC which has been
deprecated on infra managed devservers. The test can use a subset of the
xbuddy_translate RPC (the latestbuild RPC) for their usecase. This CL re-enables the latestbuild RPC on the devserver.

BUG=chromium:1057306
Test=None

Change-Id: I0cc02db9cb041ecfc4c8bdeee5802cf19e318796
Reviewed-on: https://chromium-review.googlesource.com/c/chromiumos/platform/dev-util/+/2083578
Tested-by: Sanika Kulkarni <sanikak@chromium.org>
Auto-Submit: Sanika Kulkarni <sanikak@chromium.org>
Reviewed-by: Allen Li <ayatane@chromium.org>
Reviewed-by: Congbin Guo <guocb@chromium.org>
Commit-Queue: Sanika Kulkarni <sanikak@chromium.org>
diff --git a/devserver.py b/devserver.py
index 365d8a5..4a4b145 100755
--- a/devserver.py
+++ b/devserver.py
@@ -1212,9 +1212,6 @@
           R19-1993.0.0-a1-b1480.
       An empty string if no latest could be found.
     """
-    if is_deprecated_server():
-      raise DeprecatedRPCError('latestbuild')
-
     if not kwargs:
       return _PrintDocStringAsHTML(self.latestbuild)