LV 2.0: drop reporting FIR_COMPILED_CLASS and relevant stuff

#KT-62056 Fixed
Related to KT-59171, KT-61951

core/compiler.common.jvm/src/org/jetbrains/kotlin/load/java/JvmAnnotationNames.java

@@ -31,6 +31,7 @@ public final class JvmAnnotationNames {
     public static final int METADATA_STRICT_VERSION_SEMANTICS_FLAG = 1 << 3;
     public static final int METADATA_JVM_IR_FLAG = 1 << 4;
     public static final int METADATA_JVM_IR_STABLE_ABI_FLAG = 1 << 5;
+    @SuppressWarnings("unused")
     public static final int METADATA_FIR_FLAG = 1 << 6;
     public static final int METADATA_PUBLIC_ABI_FLAG = 1 << 7;
 

core/compiler.common/src/org/jetbrains/kotlin/serialization/deserialization/descriptors/DeserializedContainerSource.kt

@@ -27,12 +27,10 @@ enum class DeserializedContainerAbiStability {
     // Either the container is stable, or this compiler is configured to ignore ABI stability of dependencies.
     STABLE,
 
-    // The container is unstable because it is compiled with FIR, and this compiler is _not_ configured to ignore that.
-    FIR_UNSTABLE,
-
     // The container is unstable because either:
     // 1) it is compiled with JVM IR prior to 1.4.30, or
     // 2) it is compiled with JVM IR >= 1.4.30 with the `-Xabi-stability=unstable` compiler option,
+    // 3) it is compiled with FIR prior to 2.0.0,
     // and this compiler is _not_ configured to ignore that.
     IR_UNSTABLE,
 }

core/descriptors.jvm/src/org/jetbrains/kotlin/load/kotlin/DeserializedDescriptorResolver.kt

@@ -112,7 +112,6 @@ class DeserializedDescriptorResolver {
     private val KotlinJvmBinaryClass.abiStability: DeserializedContainerAbiStability
         get() = when {
             components.configuration.allowUnstableDependencies -> DeserializedContainerAbiStability.STABLE
-            classHeader.isUnstableFirBinary -> DeserializedContainerAbiStability.FIR_UNSTABLE
             classHeader.isUnstableJvmIrBinary -> DeserializedContainerAbiStability.IR_UNSTABLE
             else -> DeserializedContainerAbiStability.STABLE
         }

core/deserialization.common.jvm/src/org/jetbrains/kotlin/load/kotlin/header/KotlinClassHeader.kt

@@ -62,9 +62,6 @@ class KotlinClassHeader(
     val isUnstableJvmIrBinary: Boolean
         get() = extraInt.has(METADATA_JVM_IR_FLAG) && !extraInt.has(METADATA_JVM_IR_STABLE_ABI_FLAG)
 
-    val isUnstableFirBinary: Boolean
-        get() = extraInt.has(METADATA_FIR_FLAG) && !extraInt.has(METADATA_JVM_IR_STABLE_ABI_FLAG)
-
     val isPreRelease: Boolean
         get() = extraInt.has(METADATA_PRE_RELEASE_FLAG)