Remove unused isProcessingDispatch #688

Job	Run time
Test Suite	1m 5s
Test Types with TypeScript 4.7	32s
Check package config with are-the-types-wrong (16.x)	18s
Test Types with TypeScript 4.8	32s
Test Published Artifact (Local) rr-rsc-context	58s
Test Published Artifact cra4	1m 35s
Test Types with TypeScript 4.9	33s
Test Published Artifact cra5	1m 31s
Test Types with TypeScript 5.0	29s
Test Published Artifact next	1m 30s
Test Types with TypeScript 5.1	29s
Test Types with TypeScript 5.2	36s
Test Published Artifact vite	56s
Test Published Artifact node-standard	16s
Test Published Artifact node-esm	19s
	11m 39s

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