Fir2Ir: remove unneeded ExternalDependenciesGenerator calls

compiler/fir/fir2ir/src/org/jetbrains/kotlin/fir/backend/Fir2IrConverter.kt

@@ -47,8 +47,8 @@ import org.jetbrains.kotlin.ir.visitors.acceptVoid
 import org.jetbrains.kotlin.name.FqName
 import org.jetbrains.kotlin.platform.TargetPlatform
 import org.jetbrains.kotlin.psi.KtFile
+import org.jetbrains.kotlin.psi2ir.generators.DeclarationStubGeneratorImpl
 import org.jetbrains.kotlin.psi2ir.generators.GeneratorExtensions
-import org.jetbrains.kotlin.psi2ir.generators.generateTypicalIrProviderList
 import org.jetbrains.kotlin.resolve.BindingContext
 
 class Fir2IrConverter(
@@ -73,20 +73,6 @@ class Fir2IrConverter(
         for (firFile in allFirFiles) {
             registerFileAndClasses(firFile, irModuleFragment)
         }
-
-        val irProviders =
-            generateTypicalIrProviderList(
-                irModuleFragment.descriptor, irBuiltIns, symbolTable,
-                descriptorFinder = DescriptorByIdSignatureFinderImpl(irModuleFragment.descriptor, descriptorMangler),
-                extensions = extensions
-            )
-        val externalDependenciesGenerator = ExternalDependenciesGenerator(
-            symbolTable,
-            irProviders
-        )
-
-        // Necessary call to generate built-in IR classes
-        externalDependenciesGenerator.generateUnboundSymbolsAsDependencies()
         classifierStorage.preCacheBuiltinClasses()
         // The file processing is performed phase-to-phase:
         //   1. Creation of all non-local regular classes
@@ -119,8 +105,11 @@ class Fir2IrConverter(
             firFile.accept(fir2irVisitor, null)
         }
 
-        externalDependenciesGenerator.generateUnboundSymbolsAsDependencies()
-        val stubGenerator = irProviders.filterIsInstance<DeclarationStubGenerator>().first()
+        val stubGenerator = DeclarationStubGeneratorImpl(
+            irModuleFragment.descriptor, symbolTable, irBuiltIns,
+            DescriptorByIdSignatureFinderImpl(irModuleFragment.descriptor, descriptorMangler),
+            extensions
+        )
         irModuleFragment.acceptVoid(ExternalPackageParentPatcher(stubGenerator))
 
         evaluateConstants(irModuleFragment)