AA: remove unnecessary source path retrieval/cache

Instead, use source module's contentScope

analysis/analysis-api-standalone/src/org/jetbrains/kotlin/analysis/project/structure/impl/ProjectStructureProviderByCompilerConfiguration.kt

@@ -11,39 +11,19 @@ import com.intellij.psi.PsiElement
 import org.jetbrains.kotlin.analysis.project.structure.KtModule
 import org.jetbrains.kotlin.analysis.project.structure.ProjectStructureProvider
 import org.jetbrains.kotlin.config.CompilerConfiguration
-import org.jetbrains.kotlin.cli.jvm.config.javaSourceRoots
 import org.jetbrains.kotlin.psi.KtFile
-import java.nio.file.Files
-import java.nio.file.Paths
 
 internal class ProjectStructureProviderByCompilerConfiguration(
-    private val compilerConfig: CompilerConfiguration,
+    compilerConfig: CompilerConfiguration,
     project: Project,
     ktFiles: List<KtFile>,
     jarFileSystem: CoreJarFileSystem,
 ) : ProjectStructureProvider() {
-    private val sourceFiles: Set<String> by lazy {
-        buildSet {
-            compilerConfig.javaSourceRoots.forEach { srcRoot ->
-                val path = Paths.get(srcRoot)
-                if (Files.isDirectory(path)) {
-                    // E.g., project/app/src
-                    Files.walk(path)
-                        .filter(Files::isRegularFile)
-                        .forEach { add(it.toString()) }
-                } else {
-                    // E.g., project/app/src/some/pkg/main.kt
-                    add(srcRoot)
-                }
-            }
-        }
-    }
-
     private val sourceModule = KtSourceModuleByCompilerConfiguration(compilerConfig, project, ktFiles, jarFileSystem)
 
     override fun getKtModuleForKtElement(element: PsiElement): KtModule {
         val containingFile = element.containingFile.virtualFile
-        return if (containingFile.path in sourceFiles) {
+        return if (containingFile in sourceModule.contentScope) {
             sourceModule
         } else {
             sourceModule.directRegularDependencies.find { libModule -> containingFile in libModule.contentScope }