[Commonizer] AbstractCommonizationFromSourcesTest remove assertions on commonized leaf/platform libraries

Those assertions are not necessary anymore, since the commonizer is not
expected to produce any new "actuals" per given expect.
The IDE is supposed to analyze leaf source sets against the original
platform libraries.

native/commonizer/testData/propertyCommonization/setters/commonized/js/package_root.kt

@@ -1,30 +0,0 @@
-actual var defaultSetter1 = 42
-actual var defaultSetter2 = 42
-    set
-actual var defaultSetter3 = 42
-    set
-
-actual var setterWithoutBackingField1
-    get() = 42
-    set(value) = Unit
-actual var setterWithoutBackingField2
-    get() = 42
-    set(value) = Unit
-
-actual var setterWithDelegation1: Int by mutableMapOf("setterWithDelegation1" to 42)
-actual var setterWithDelegation2: Int by mutableMapOf("setterWithDelegation2" to 42)
-
-actual var defaultSetteCustomVisibility1 = 42
-    public set
-var defaultSetteCustomVisibility2 = 42
-    internal set
-actual var defaultSetteCustomVisibility3 = 42
-    internal set
-var defaultSetteCustomVisibility4 = 42
-    private set
-var defaultSetteCustomVisibility5 = 42
-    private set
-
-actual val propertyWithoutSetter = 42
-var propertyMaybeSetter = 42
-actual var propertyWithSetter = 42

native/commonizer/testData/propertyCommonization/setters/commonized/jvm/package_root.kt

@@ -1,27 +0,0 @@
-actual var defaultSetter1 = 42
-actual var defaultSetter2 = 42
-actual var defaultSetter3 = 42
-    set
-
-actual var setterWithoutBackingField1
-    get() = 42
-    set(value) = Unit
-actual var setterWithoutBackingField2 = 42
-
-actual var setterWithDelegation1: Int by mutableMapOf("setterWithDelegation1" to 42)
-actual var setterWithDelegation2 = 42
-
-actual var defaultSetteCustomVisibility1 = 42
-    public set
-var defaultSetteCustomVisibility2 = 42
-    public set
-actual var defaultSetteCustomVisibility3 = 42
-    internal set
-var defaultSetteCustomVisibility4 = 42
-    internal set
-var defaultSetteCustomVisibility5 = 42
-    private set
-
-actual val propertyWithoutSetter = 42
-val propertyMaybeSetter = 42
-actual var propertyWithSetter = 42