unable to reproduce linkage issue (#5912)

programs/bpf/rust/128bit_dep/src/lib.rs

@@ -33,24 +33,3 @@ pub fn divide(n: i128, d: i128) -> i128 {
 pub fn modulo(n: i128, d: i128) -> i128 {
     n % d
 }
-
-#[cfg(test)]
-mod test {
-    use super::*;
-
-    #[test]
-    fn pull_in_externs() {
-        // Rust on Linux excludes the externs unless there is a
-        // direct dependency, use this test to force the pull in of the library.
-        // This is not necessary on macos and unfortunate on Linux
-        // Issue #4972
-        use solana_sdk::program_test::*;
-        unsafe { sol_log_("X".as_ptr(), 1) };
-        sol_log_64_(1, 2, 3, 4, 5);
-    }
-
-    #[test]
-    fn test_add() {
-        assert_eq!(3, add(1, 2));
-    }
-}