Remove unused dependencyIsNotTestScope method

This method became dead code after the TC-3920 refactor that moved
test-scope filtering to use DependencyAggregator.isTestDependency()
directly in parseDependencyTree().

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

Author: ruromero

src/main/java/io/github/guacsec/trustifyda/providers/BaseJavaProvider.java

@@ -62,10 +62,6 @@ void parseDependencyTree(String src, int srcDepth, String[] lines, Sbom sbom, St
     }
   }
 
-  static boolean dependencyIsNotTestScope(DependencyAggregator dep) {
-    return !dep.isTestDependency();
-  }
-
   DependencyAggregator parseDep(String dep) {
     // root package
     DependencyAggregator dependencyAggregator = new DependencyAggregator();