JVM_IR: remove another redundant lowering

compiler/ir/backend.jvm/src/org/jetbrains/kotlin/backend/jvm/JvmLower.kt

@@ -59,7 +59,6 @@ val jvmPhases = namedIrFilePhase<JvmBackendContext>(
     name = "IrLowering",
     description = "IR lowering",
     lower = expectDeclarationsRemovingPhase then
-            jvmCoercionToUnitPhase then
             fileClassPhase then
             kCallableNamePropertyPhase then
 

compiler/ir/backend.jvm/src/org/jetbrains/kotlin/backend/jvm/lower/JvmCoercionToUnitPatcher.kt

@@ -1,47 +0,0 @@
-/*
- * Copyright 2010-2018 JetBrains s.r.o. and Kotlin Programming Language contributors.
- * Use of this source code is governed by the Apache 2.0 license that can be found in the license/LICENSE.txt file.
- */
-
-package org.jetbrains.kotlin.backend.jvm.lower
-
-import org.jetbrains.kotlin.backend.common.FileLoweringPass
-import org.jetbrains.kotlin.backend.common.phaser.makeIrFilePhase
-import org.jetbrains.kotlin.backend.jvm.JvmBackendContext
-import org.jetbrains.kotlin.backend.jvm.JvmGeneratorExtensions
-import org.jetbrains.kotlin.ir.declarations.IrFile
-import org.jetbrains.kotlin.ir.expressions.IrCall
-import org.jetbrains.kotlin.ir.expressions.IrExpression
-import org.jetbrains.kotlin.ir.types.isSubtypeOfClass
-import org.jetbrains.kotlin.ir.types.toKotlinType
-import org.jetbrains.kotlin.ir.util.TypeTranslator
-import org.jetbrains.kotlin.ir.util.coerceToUnitIfNeeded
-import org.jetbrains.kotlin.ir.visitors.transformChildrenVoid
-import org.jetbrains.kotlin.psi2ir.transformations.InsertImplicitCasts
-
-internal val jvmCoercionToUnitPhase = makeIrFilePhase(
-    ::JvmCoercionToUnitPatcher,
-    name = "JvmCoercionToUnit",
-    description = "Insert conversions to unit after IrCalls where needed"
-)
-
-class JvmCoercionToUnitPatcher(val context: JvmBackendContext) :
-    InsertImplicitCasts(
-        context.builtIns, context.irBuiltIns,
-        TypeTranslator(context.ir.symbols.externalSymbolTable, context.state.languageVersionSettings, context.builtIns),
-        JvmGeneratorExtensions.samConversion
-    ),
-    FileLoweringPass {
-
-    override fun lower(irFile: IrFile) {
-        irFile.transformChildrenVoid(this)
-    }
-
-    override fun IrExpression.coerceToUnit(): IrExpression {
-        if (type.isSubtypeOfClass(context.irBuiltIns.unitClass) && this is IrCall) {
-            return coerceToUnitIfNeeded(symbol.owner.returnType.toKotlinType(), context.irBuiltIns)
-        }
-
-        return this
-    }
-}