Remove `View.inspector(item:)` (#221) #550

Job	Run time
Windows (windows-latest, debug)	5m 36s
library (15.4, ios)	7m 0s
Windows (windows-latest, release)	15m 6s
library (15.4, macos)	6m 59s
library (15.4, tvos)	7m 42s
library (15.4, watchos)	6m 30s
library (15.4, examples)	9m 1s
	57m 54s

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