Remove generated iso curve #497

Job	Run time
Bench (default)	3m 38s
Clippy lint checks	39s
Rustfmt	17s
Bench (asm)	4m 59s
Wasm-compatibility (wasm32-unknown-unknown)	2m 18s
Bench (bn256-table)	5m 10s
Wasm-compatibility (wasm32-wasi)	2m 11s
Test (default)	7m 47s
Test (bn256-table)	7m 42s
Spell Check with Typos	4s
Test (derive_serde)	7m 57s
Test (asm)	6m 52s
	49m 34s

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