diff --git a/Cargo.lock b/Cargo.lock
diff --git a/Cargo.toml b/Cargo.toml
@@ -184,7 +184,6 @@ num-integer = "0.1.46"
num-traits = "0.2"
num_enum = { version = "0.7", default-features = false }
optional = "0.5"
-once_cell = "1.20.3"
parking_lot = "0.12.3"
paste = "1.0.15"
proc-macro2 = "1.0.105"

diff --git a/crates/common/Cargo.toml b/crates/common/Cargo.toml
@@ -28,7 +28,6 @@ malachite-bigint = { workspace = true }
malachite-q = { workspace = true }
malachite-base = { workspace = true }
num-traits = { workspace = true }
-once_cell = { workspace = true }
parking_lot = { workspace = true, optional = true }
unicode_names2 = { workspace = true }
radium = { workspace = true }

diff --git a/crates/common/src/lock.rs b/crates/common/src/lock.rs
@@ -10,12 +10,12 @@ cfg_if::cfg_if! {
    if #[cfg(feature = "threading")] {
        pub use parking_lot::{RawMutex, RawRwLock, RawThreadId};

-        pub use once_cell::sync::{Lazy, OnceCell};
    } else {
        mod cell_lock;
        pub use cell_lock::{RawCellMutex as RawMutex, RawCellRwLock as RawRwLock, SingleThreadId as RawThreadId};

-        pub use once_cell::unsync::{Lazy, OnceCell};
    }
}


diff --git a/crates/common/src/static_cell.rs b/crates/common/src/static_cell.rs
@@ -31,7 +31,12 @@ mod threading {
        where
            F: FnOnce() -> Result<T, E>,
        {
-            self.inner.get_or_try_init(f)
        }
    }

@@ -92,8 +97,15 @@ mod non_threading {
        where
            F: FnOnce() -> Result<T, E>,
        {
-            self.inner
-                .with(|x| x.get_or_try_init(|| f().map(leak)).copied())
        }
    }

@@ -156,7 +168,12 @@ mod no_std {
        where
            F: FnOnce() -> Result<T, E>,
        {
-            self.inner.0.get_or_try_init(f)
        }
    }


diff --git a/crates/vm/src/builtins/function.rs b/crates/vm/src/builtins/function.rs
@@ -816,15 +816,16 @@ impl PyFunction {
    #[cfg(feature = "jit")]
    #[pymethod]
    fn __jit__(zelf: PyRef<Self>, vm: &VirtualMachine) -> PyResult<()> {
-        zelf.jitted_code
-            .get_or_try_init(|| {
-                let arg_types = jit::get_jit_arg_types(&zelf, vm)?;
-                let ret_type = jit::jit_ret_type(&zelf, vm)?;
-                let code = zelf.code.lock();
-                rustpython_jit::compile(&code.code, &arg_types, ret_type)
-                    .map_err(|err| jit::new_jit_error(err.to_string(), vm))
-            })
-            .map(drop)
    }
}