Revert "KT-23394: Add a test with a property"

This reverts commit f2dc132d

idea/testData/quickfix/typeMismatch/variableInitializedWithNullProperty.kt

@@ -1,10 +0,0 @@
-// "Change type of 'Foo.x' to 'String?'" "true"
-class Foo {
-    var x = null
-
-    fun foo(condition: Boolean) {
-        if (condition) {
-            x = "abc"<caret>
-        }
-    }
-}

idea/testData/quickfix/typeMismatch/variableInitializedWithNullProperty.kt.after

@@ -1,10 +0,0 @@
-// "Change type of 'Foo.x' to 'String?'" "true"
-class Foo {
-    var x: String? = null
-
-    fun foo(condition: Boolean) {
-        if (condition) {
-            x = "abc"<caret>
-        }
-    }
-}