Fix Issue 19471 - Duplicate error messages when trying to use an inaccessible package symbol

[JinShil]

This is actually a followup to #8443. It removes what appears to be a redundant deprecation message in

dmd/test/fail_compilation/fail313.d

Line 5 in 987012b

fail_compilation/fail313.d(24): Deprecation: `imports.a313.core` is not visible from module `test313`

It also happens to solve Issue 19014. I didn't add a test specific to Issue 19014 because the changes to fail313.d seem to cover it.

cc @RazvanN7

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Bugzilla references

Auto-close	Bugzilla	Severity	Description
✓	19471	normal	Duplicate error messages when trying to use an inaccessible package symbol

Testing this PR locally

If you don't have a local development environment setup, you can use Digger to test this PR:

dub fetch digger
dub run digger -- build "master + dmd#9056"

[JinShil]

Grrr. This doesn't look like the right fix. The way forward is probably to adopt #7241 first.