core: Remove error return from IndexingContext.revert_data_sources #11364

Job	Run time
Run integration tests	4m 1s
Build in release mode	3m 26s
Clippy linting	1m 44s
Subgraph Runner integration tests	2m 53s
Check rustfmt style	13s
Run unit tests	3m 42s
	15m 59s

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