Remove getting lookups with generated classes fq-names

KT-8487

libraries/tools/kotlin-gradle-plugin-core/src/main/kotlin/org/jetbrains/kotlin/gradle/tasks/Tasks.kt

@@ -255,13 +255,6 @@ open class KotlinCompile() : AbstractKotlinCompile<K2JVMCompilerArguments>() {
                     innerClasses.flatMap { it.findLookupSymbols() }
         }
 
-        fun dirtyLookupSymbolsFromRemovedKotlinFiles(): List<LookupSymbol> {
-            val removedKotlinFiles = removed.filter { it.isKotlinFile() }
-            return if (removedKotlinFiles.isNotEmpty())
-                targets.flatMap { getIncrementalCache(it).classesBySources(removedKotlinFiles).map { LookupSymbol(it.fqNameForClassNameWithoutDollars.shortName().toString(), it.packageFqName.toString()) } }
-            else listOf()
-        }
-
         fun dirtyLookupSymbolsFromModifiedJavaFiles(): List<LookupSymbol> {
             val modifiedJavaFiles = modified.filter { it.isJavaFile() }
             return (if (modifiedJavaFiles.any()) {
@@ -282,9 +275,7 @@ open class KotlinCompile() : AbstractKotlinCompile<K2JVMCompilerArguments>() {
         fun dirtyKotlinSourcesFromGradle(): Set<File> {
             // TODO: handle classpath changes similarly - compare with cashed version (likely a big change, may be costly, some heuristics could be considered)
             val modifiedKotlinFiles = modified.filter { it.isKotlinFile() }.toMutableSet()
-            val lookupSymbols =
-                    dirtyLookupSymbolsFromModifiedJavaFiles() +
-                    dirtyLookupSymbolsFromRemovedKotlinFiles()
+            val lookupSymbols = dirtyLookupSymbolsFromModifiedJavaFiles()
                     // TODO: add dirty lookups from modified kotlin files to reduce number of steps needed
 
             if (lookupSymbols.any()) {
@@ -362,6 +353,7 @@ open class KotlinCompile() : AbstractKotlinCompile<K2JVMCompilerArguments>() {
                 it.markOutputClassesDirty(removedKotlinFiles)
                 it.removeClassfilesBySources(removedKotlinFiles)
             }}
+
             return Pair(dirtyFiles, true)
         }