Remove error on annotated types as arguments to typeOf

Instead, document that `KType.annotations` returns an empty list for
types created with `typeOf`. Annotations might be supported in the
future.

 #KT-49573 Fixed
 #KT-29919

compiler/backend/src/org/jetbrains/kotlin/codegen/inline/PsiInlineIntrinsicsSupport.kt

@@ -5,7 +5,6 @@
 
 package org.jetbrains.kotlin.codegen.inline
 
-import org.jetbrains.kotlin.builtins.StandardNames
 import org.jetbrains.kotlin.builtins.jvm.JavaToKotlinClassMap
 import org.jetbrains.kotlin.codegen.*
 import org.jetbrains.kotlin.codegen.state.GenerationState
@@ -13,12 +12,12 @@ import org.jetbrains.kotlin.descriptors.ClassDescriptor
 import org.jetbrains.kotlin.descriptors.FunctionDescriptor
 import org.jetbrains.kotlin.descriptors.PropertyDescriptor
 import org.jetbrains.kotlin.descriptors.TypeParameterDescriptor
-import org.jetbrains.kotlin.load.java.JvmAnnotationNames
 import org.jetbrains.kotlin.name.Name
 import org.jetbrains.kotlin.psi.KtElement
 import org.jetbrains.kotlin.resolve.descriptorUtil.fqNameUnsafe
 import org.jetbrains.kotlin.resolve.jvm.AsmTypes.*
-import org.jetbrains.kotlin.resolve.jvm.diagnostics.ErrorsJvm.*
+import org.jetbrains.kotlin.resolve.jvm.diagnostics.ErrorsJvm.TYPEOF_NON_REIFIED_TYPE_PARAMETER_WITH_RECURSIVE_BOUND
+import org.jetbrains.kotlin.resolve.jvm.diagnostics.ErrorsJvm.TYPEOF_SUSPEND_TYPE
 import org.jetbrains.kotlin.types.KotlinType
 import org.jetbrains.kotlin.types.model.TypeParameterMarker
 import org.jetbrains.org.objectweb.asm.Type
@@ -73,14 +72,6 @@ class PsiInlineIntrinsicsSupport(
 
     override fun toKotlinType(type: KotlinType): KotlinType = type
 
-    override fun checkAnnotatedType(type: KotlinType) {
-        if (type.annotations.hasAnnotation(StandardNames.FqNames.extensionFunctionType)) {
-            state.diagnostics.report(TYPEOF_EXTENSION_FUNCTION_TYPE.on(reportErrorsOn))
-        } else if (type.annotations.any { it.fqName != JvmAnnotationNames.ENHANCED_NULLABILITY_ANNOTATION }) {
-            state.diagnostics.report(TYPEOF_ANNOTATED_TYPE.on(reportErrorsOn))
-        }
-    }
-
     override fun reportSuspendTypeUnsupported() {
         state.diagnostics.report(TYPEOF_SUSPEND_TYPE.on(reportErrorsOn))
     }

compiler/backend/src/org/jetbrains/kotlin/codegen/inline/ReifiedTypeInliner.kt

@@ -73,7 +73,6 @@ class ReifiedTypeInliner<KT : KotlinTypeMarker>(
 
         fun toKotlinType(type: KT): KotlinType
 
-        fun checkAnnotatedType(type: KT)
         fun reportSuspendTypeUnsupported()
         fun reportNonReifiedTypeParameterWithRecursiveBoundUnsupported(typeParameterName: Name)
     }

compiler/backend/src/org/jetbrains/kotlin/codegen/inline/typeOf.kt

@@ -95,8 +95,6 @@ fun <KT : KotlinTypeMarker> TypeSystemCommonBackendContext.generateTypeOf(
         intrinsicsSupport.reportSuspendTypeUnsupported()
     }
 
-    intrinsicsSupport.checkAnnotatedType(type)
-
     if (intrinsicsSupport.state.stableTypeOf) {
         if (intrinsicsSupport.isMutableCollectionType(type)) {
             v.invokestatic(REFLECTION, "mutableCollectionType", Type.getMethodDescriptor(K_TYPE, K_TYPE), false)