REPL unnecessarily reports bindings as unused variables and the error contains wrong location

[radeusgd]

The repro is trivial - just declare a named binding in the REPL:

> abc = 123
[WARN] [2024-05-08T00:52:20+02:00] [enso.org.enso.compiler.Compiler] Internal_Repl_Module___:1:1: warning: Unused variable abc.
    1 | from Standard.Base import all
      | ^~~
>>> Nothing

Expected behaviour

1. The warning should not be reported - it is expected in the REPL that the variable is not yet used.
2. Even if it is shown - the location of the error is wrong.

[JaroslavTulach]

I've heard similar complain by @jdunkerley for the IDE case. Warnings of unused operatorXYZ are reported and they quite useless as it is a common development practice to have unused values in the IDE.

Can we disable unused bindings pass when STRICT_ERRORS are false? That would fix the IDE case. Is REPL running with strict or non-strict errors? If the latter, the change would fix also the repl mode.