Remove madara and pathfinder submodules #1296

Job	Run time
Run coverage / coverage	36m 23s
Build Rust project / rust_build	3m 37s
Run Cargo linters / cargo-lint	5m 5s
E2E test / coverage	15m 51s
Run linters / prettier	18s
Run linters / toml-lint	8s
Run linters / markdown-lint	16s
	1h 1m 38s

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