FIR: return Unit from empty lambda

compiler/testData/ir/irText/lambdas/justLambda.fir.txt

@@ -1,26 +0,0 @@
-FILE fqName:<root> fileName:/justLambda.kt
-  PROPERTY name:test1 visibility:public modality:FINAL [val]
-    FIELD PROPERTY_BACKING_FIELD name:test1 type:kotlin.Function0<kotlin.Int> visibility:private [final,static]
-      EXPRESSION_BODY
-        FUN_EXPR type=kotlin.Function0<kotlin.Int> origin=LAMBDA
-          FUN LOCAL_FUNCTION_FOR_LAMBDA name:<anonymous> visibility:local modality:FINAL <> () returnType:kotlin.Int
-            BLOCK_BODY
-              RETURN type=kotlin.Nothing from='local final fun <anonymous> (): kotlin.Int declared in <root>.test1'
-                CONST Int type=kotlin.Int value=42
-    FUN DEFAULT_PROPERTY_ACCESSOR name:<get-test1> visibility:public modality:FINAL <> () returnType:kotlin.Function0<kotlin.Int>
-      correspondingProperty: PROPERTY name:test1 visibility:public modality:FINAL [val]
-      BLOCK_BODY
-        RETURN type=kotlin.Nothing from='public final fun <get-test1> (): kotlin.Function0<kotlin.Int> declared in <root>'
-          GET_FIELD 'FIELD PROPERTY_BACKING_FIELD name:test1 type:kotlin.Function0<kotlin.Int> visibility:private [final,static]' type=kotlin.Function0<kotlin.Int> origin=null
-  PROPERTY name:test2 visibility:public modality:FINAL [val]
-    FIELD PROPERTY_BACKING_FIELD name:test2 type:kotlin.Function0<kotlin.Unit> visibility:private [final,static]
-      EXPRESSION_BODY
-        FUN_EXPR type=kotlin.Function0<kotlin.Unit> origin=LAMBDA
-          FUN LOCAL_FUNCTION_FOR_LAMBDA name:<anonymous> visibility:local modality:FINAL <> () returnType:kotlin.Unit
-            BLOCK_BODY
-              GET_OBJECT 'CLASS IR_EXTERNAL_DECLARATION_STUB OBJECT name:Unit modality:FINAL visibility:public superTypes:[kotlin.Any]' type=kotlin.Unit
-    FUN DEFAULT_PROPERTY_ACCESSOR name:<get-test2> visibility:public modality:FINAL <> () returnType:kotlin.Function0<kotlin.Unit>
-      correspondingProperty: PROPERTY name:test2 visibility:public modality:FINAL [val]
-      BLOCK_BODY
-        RETURN type=kotlin.Nothing from='public final fun <get-test2> (): kotlin.Function0<kotlin.Unit> declared in <root>'
-          GET_FIELD 'FIELD PROPERTY_BACKING_FIELD name:test2 type:kotlin.Function0<kotlin.Unit> visibility:private [final,static]' type=kotlin.Function0<kotlin.Unit> origin=null

compiler/testData/ir/irText/lambdas/justLambda.kt

@@ -1,3 +1,4 @@
+// FIR_IDENTICAL
 val test1 = { 42 }
 
 val test2 = { }