Do not write version requirements for InlineClasses

Language feature InlineClasses is enabled since 1.3. The current lowest
supported language version is 1.4, so any compiler that can read
binaries produced by the current compiler also supports inline classes,
which means that the version requirement is not needed anymore.

No issue reported because it's mostly not a user-visible change. The
main effect is that it reduces differences in metadata between K1 and
K2, because K2 never supported writing this version requirement properly
due to the TODO in `hasInlineClassTypesInSignature`.

compiler/testData/versionRequirement/inlineClassReturnTypeMangled.kt

@@ -5,11 +5,4 @@ inline class IC(val x: Int)
 class C {
     fun returnsInlineClassType(): IC = IC(42)
     val propertyOfInlineClassType: IC get() = IC(42)
-
-    @Suppress("INAPPLICABLE_JVM_NAME")
-    @JvmName("returnsInlineClassTypeJvmName")
-    fun returnsInlineClassTypeJvmName(): IC = IC(42)
 }
-
-fun returnsInlineClassType(): IC = IC(42)
-val propertyOfInlineClassType: IC get() = IC(42)

compiler/testData/versionRequirement/inlineClassesAndRelevantDeclarations13.kt

@@ -1,17 +0,0 @@
-package test
-
-inline class IC(val x: String)
-
-typealias ICAlias = IC
-
-class Ctor(ic: IC)
-
-fun simpleFun(f: IC) {}
-fun aliasedFun(f: ICAlias) {}
-
-val simpleProp: IC = IC("")
-
-fun result(r: List<Result<Any>?>) {}
-
-abstract class Foo : List<IC>
-interface Bar<T : IC>