Check if `testOracleList`, `testL2OptimismSpell`, `testL2ArbitrumSpell` can be removed.

[riccardopersiani]

• function testOracleList() public skipped { // TODO: check if this test can be removed for good;
• function testL2OptimismSpell() public skipped { // TODO: check if this test can be removed for good;
• function testL2ArbitrumSpell() public skipped { // TODO: check if this test can be removed for good.