Revert "Introduce global `viewer/!sync-state` (#697)" #5285

Job	Run time
clj-kondo	13s
build-and-upload-viewer-resources	1m 52s
test (macos-latest, bash)	2m 44s
test (ubuntu-latest, bash)	1m 8s
test (windows-latest, powershell)	1m 34s
static-build	0s
SSR smoke test build	0s
ui-tests	0s
deploy	0s
	7m 31s

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