Fix unused import error in LoadedPrograms

[pgarg66]

Problem

Seeing this warning while building on MacOS.

 --> program-runtime/src/loaded_programs.rs:8:9
  |
8 |         error::EbpfError,
  |         ^^^^^^^^^^^^^^^^
  |
  = note: `#[warn(unused_imports)]` on by default

Summary of Changes

Move import under the requied config flag.

Fixes #

[codecov]

Codecov Report

Merging #31116 (4e32198) into master (2630f85) will not change coverage.
The diff coverage is 100.0%.

@@           Coverage Diff           @@
##           master   #31116   +/-   ##
=======================================
  Coverage    81.5%    81.5%           
=======================================
  Files         728      728           
  Lines      205783   205783           
=======================================
  Hits       167805   167805           
  Misses      37978    37978