[JS IR] Drop pirLowerings lowering list

compiler/ir/backend.js/src/org/jetbrains/kotlin/ir/backend/js/JsLoweringPhases.kt

@@ -956,9 +956,6 @@ val loweringList = listOf<Lowering>(
     validateIrAfterLowering,
 )
 
-// TODO comment? Eliminate ModuleLowering's? Don't filter them here?
-val pirLowerings = loweringList.filter { it is DeclarationLowering || it is BodyLowering } + staticMembersLoweringPhase
-
 val jsPhases = SameTypeNamedCompilerPhase(
     name = "IrModuleLowering",
     description = "IR module lowering",

compiler/ir/backend.js/src/org/jetbrains/kotlin/ir/backend/js/compilerWithIC.kt

@@ -88,5 +88,5 @@ fun lowerPreservingTags(
         lowering.modulePhase.invoke(phaseConfig, phaserState, context, modules)
     }
 
-    controller.currentStage = pirLowerings.size + 1
+    controller.currentStage = loweringList.size + 1
 }