Update java/ql/src/Violations of Best Practice/Undesirable Calls/CallsToSystemExit.ql

Co-authored-by: Michael Nebel <michaelnebel@github.com>

Author: Napalys

java/ql/src/Violations of Best Practice/Undesirable Calls/CallsToSystemExit.ql

@@ -62,7 +62,6 @@ class SourceMethodNotMainOrTest extends Method {
   SourceMethodNotMainOrTest() {
     this.fromSource() and
     not this instanceof MainMethod and
-    not this instanceof LikelyTestMethod and
     not (
       this.getEnclosingCallable*() instanceof LikelyTestMethod
       or