chore: clean repository of placeholder and temp files #536

Job	Run time
Test	1m 22s
Clippy	3m 7s
Build	2m 37s
Coverage	1m 39s
Nightly Build & Test	0s
Docker Nightly Build	0s
Integration	1s
Docker	1s
E2E	1s
Release	1s
Docker Integration (5 Validators + WASM)	1s
	8m 50s

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