"Join declaration and assignment" should remove 'lateinit' for 'var' #KT-21603 Fixed

idea/testData/intentions/joinDeclarationAndAssignment/hasLateinit.kt

@@ -0,0 +1,5 @@
+fun foo(a: String, b: String) {
+    lateinit var c: String<caret>
+    c = a
+    c = b
+}

idea/testData/intentions/joinDeclarationAndAssignment/hasLateinit.kt.after

@@ -0,0 +1,4 @@
+fun foo(a: String, b: String) {
+    var c<selection>: String</selection><caret> = a
+    c = b
+}