[IR Actualizer] Don't report errors about not implemented members from actualizer

Reporting of those errors was implemented as an ad-hock solution for part
 of the KT-58881, and it was implemented incorrectly. There won't be any
 need in this reporting in actualizer after KT-58881 will be fixed, so
 there is no actual sense to fix their implementation in actualizer itself
 (as it will be removed)

compiler/ir/backend.common/src/org/jetbrains/kotlin/backend/common/CommonBackendErrors.kt

@@ -28,8 +28,6 @@ import org.jetbrains.kotlin.resolve.multiplatform.ExpectActualCompatibility
 
 object CommonBackendErrors {
     val NO_ACTUAL_FOR_EXPECT by error2<PsiElement, String, ModuleDescriptor>()
-    val MANY_INTERFACES_MEMBER_NOT_IMPLEMENTED by error2<PsiElement, String, String>()
-    val MANY_IMPL_MEMBER_NOT_IMPLEMENTED by error2<PsiElement, String, String>()
     val INCOMPATIBLE_MATCHING by error3<PsiElement, String, String, ExpectActualCompatibility.Incompatible<*>>()
     val ACTUAL_ANNOTATIONS_NOT_MATCH_EXPECT by warning3<PsiElement, IrSymbol, IrSymbol, ExpectActualAnnotationsIncompatibilityType<IrConstructorCall>>()
     val EVALUATION_ERROR by error1<PsiElement, String>()
@@ -48,18 +46,6 @@ object KtDefaultCommonBackendErrorMessages : BaseDiagnosticRendererFactory() {
             STRING,
             MODULE_WITH_PLATFORM,
         )
-        map.put(
-            CommonBackendErrors.MANY_INTERFACES_MEMBER_NOT_IMPLEMENTED,
-            "{0} must override {1} because it inherits multiple interface methods of it",
-            STRING,
-            STRING,
-        )
-        map.put(
-            CommonBackendErrors.MANY_IMPL_MEMBER_NOT_IMPLEMENTED,
-            "{0} must override {1} because it inherits many implementations of it",
-            STRING,
-            STRING,
-        )
         map.put(
             CommonBackendErrors.INCOMPATIBLE_MATCHING,
             "Expect declaration `{0}` doesn''t match actual `{1}` because {2}",

compiler/ir/backend.common/src/org/jetbrains/kotlin/backend/common/actualizer/ActualFakeOverridesAdder.kt

@@ -117,24 +117,6 @@ internal class ActualFakeOverridesAdder(
                 processedMembers.addMember(memberFromSupertype as IrOverridableDeclaration<*>)
                 fakeOverrideInfo.addMember(newMember)
                 klass.addMember(newMember)
-            } else {
-                val baseMembers = collectActualCallablesMatchingToSpecificExpect(
-                    newMember.symbol,
-                    processedMembers.getMembersForActual(newMember),
-                    expectToActualClassMap,
-                    typeSystemContext
-                )
-
-                val errorFactory =
-                    if (baseMembers.all { ((it.owner as IrDeclaration).parent as IrClass).isInterface } && (memberFromSupertype.parent as IrClass).isInterface)
-                        CommonBackendErrors.MANY_INTERFACES_MEMBER_NOT_IMPLEMENTED
-                    else
-                        CommonBackendErrors.MANY_IMPL_MEMBER_NOT_IMPLEMENTED
-                diagnosticsReporter.at(klass).report(
-                    errorFactory,
-                    klass.name.asString(),
-                    (memberFromSupertype as IrDeclarationWithName).name.asString()
-                )
             }
         }
     }