False warning about directives in multiple java files

[prolativ]

Version(s)
0.1.19

Describe the bug
If the compiled sources contain more than one java file, a warning about using directives in multiple files is reported, even if there are no using directives in the source files.

To Reproduce

mkdir /tmp/bug-repro
cd /tmp/bug-repro
echo 'public class Foo {}' > Foo.java
echo 'public class Bar {}' > Bar.java
scala-cli compile .

This outputs:

[warn] ./Bar.java:1:1: Using directives detected in multiple files. It is recommended to keep them centralized in the /private/tmp/bug-repro/project.scala file.
[warn] public class Bar {}
[warn] ^
[warn] ./Foo.java:1:1: Using directives detected in multiple files. It is recommended to keep them centralized in the /private/tmp/bug-repro/project.scala file.
[warn] public class Foo {}
[warn] ^

Expected behaviour
Compilation should report no warnings