test: remove unused memoryrouter #1407

Job	Run time
Prepare CI	2s
Lint App / biomejs	23s
Tests / Run Tests	1m 56s
Tests / SonarQube Cloud Analysis	1m 6s
Build / Build Windows (electron-builder)	2m 21s
Build / Build macOS (electron-builder)	3m 16s
Build / Build Linux (electron-builder)	4m 48s
	13m 52s

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