remove loop-canon

hercules_opt/src/loop_canonicalization.rs

hercules_test/hercules_interpreter/src/lib.rs

hercules_test/hercules_tests/tests/fork_transform_tests.rs

hercules_test/hercules_tests/tests/forkify_tests.rs

hercules_test/hercules_tests/tests/interpreter_tests.rs

hercules_test/hercules_tests/tests/loop_tests.rs

juno_scheduler/src/compile.rs

juno_scheduler/src/ir.rs

juno_scheduler/src/pm.rs