trace! code still present in the generated non-release binary. #386

When using max_level_debug feature, and compiling a non-release build, my expectation would be that trace! code is not present in the binary. As mentioned in the documentation:

Log levels can be statically disabled at compile time via Cargo features. Log invocations at disabled levels will be skipped and will not even be present in the resulting binary

However, the binary still contains some code which is not optimized away by the Rust compiler:

  33a8bb:       e8 70 bf ff ff          callq  336830 <_ZN76_$LT$log..Level$u20$as$u20$core..cmp..PartialOrd$LT$log..LevelFilter$GT$$GT$2le17hd9204c8739150144E