Skip token count request for DeepSeek Flash #669

Job	Run time
build-and-smoke-freebuff-windows	2m 37s
build-freebuff	1m 9s
e2e-help-command	1m 16s
e2e-slash-commands	57s
e2e-terminal-command	1m 0s
e2e-agent-startup	2m 29s
e2e-ads-behavior	1m 28s
e2e-startup	1m 11s
e2e-version	54s
e2e-code-edit	1m 8s
	14m 9s

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