UI infra: remove cache and accept-encoding temproarily

Disable serving cache until the outage is debugged and fixed.

Change-Id: Iad0ac0d50b10ac08284c95dac2ad15e9f7172a59
diff --git a/infra/ui.perfetto.dev/appengine/requirements.txt b/infra/ui.perfetto.dev/appengine/requirements.txt
index 1faca3d..9aa5a27 100644
--- a/infra/ui.perfetto.dev/appengine/requirements.txt
+++ b/infra/ui.perfetto.dev/appengine/requirements.txt
@@ -1,2 +1,3 @@
-Flask==1.1.2
+Flask==2.2.5
+Jinja2==3.0.3
 requests