Remove closing summarizer on stale events

[tyler-cai-microsoft]

AB#5146

Originally this was added to differentiate between the Refresh from Server code and the Close Code which has already been removed: #16657, as we always close.

The information this event is already contained in both RefreshLatestSummaryFromServerFetch_end and during Summarize_cancel.

Remove ClosingSummarizerOnSummaryStale telemetry as it is duplicate to both RefreshLatestSummaryFromServerFetch_end and RefreshLatestSummaryAckFetch_end telemetry

[msfluid-bot]

⯆ @fluid-example/bundle-size-tests: -468 Bytes

Metric Name	Baseline Size	Compare Size	Size Diff
aqueduct.js	445.22 KB	444.99 KB	⯆ -234 Bytes
connectionState.js	680 Bytes	680 Bytes	■ No change
containerRuntime.js	238.37 KB	238.14 KB	⯆ -234 Bytes
loader.js	178.25 KB	178.25 KB	■ No change
map.js	48.06 KB	48.06 KB	■ No change
matrix.js	141.84 KB	141.84 KB	■ No change
odspDriver.js	90.24 KB	90.24 KB	■ No change
odspPrefetchSnapshot.js	41.75 KB	41.75 KB	■ No change
sharedString.js	162.68 KB	162.68 KB	■ No change
sharedTree2.js	266.54 KB	266.54 KB	■ No change
Total Size	1.72 MB	1.72 MB	⯆ -468 Bytes

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Baseline commit: d0532c6

Generated by 🚫 dangerJS against 6a7642b