Revert "text-input: Ensure only one enabled text-input resource at a … #4908

Job	Run time
clippy-check	2m 16s
format	5s
smithay-check-features	2m 45s
check-msrv	2m 3s
check-minimal	1m 15s
Documentation on Github Pages	1m 33s
anvil-check-features	2m 32s
smallvil-check	43s
smithay-tests	2m 32s
WLCS: Core tests	1m 35s
WLCS: Output tests	1m 10s
WLCS: Pointer input tests	1m 12s
WLCS: Bad Buffer Test	1m 8s
	20m 49s

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