Remove `View.inspector(item:)` #549

Job	Run time
Windows (windows-latest, debug)	5m 44s
library (15.4, ios)	9m 46s
Windows (windows-latest, release)	14m 39s
library (15.4, macos)	6m 0s
library (15.4, tvos)	9m 9s
library (15.4, watchos)	6m 34s
library (15.4, examples)	8m 51s
	1h 0m 43s

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