Removing usages of tuples from test data

(KT-2358 Drop tuples)
 #KT-2358 In progress

idea/testData/intentions/specifyType/afterUnitType.kt

@@ -1,2 +1,2 @@
 // "Specify Type Explicitly" "true"
-val x: Unit = #()
+val x: Unit = Unit.VALUE

idea/testData/intentions/specifyType/beforeUnitType.kt

@@ -1,2 +1,2 @@
 // "Specify Type Explicitly" "true"
-val x <caret>= #()
+val x <caret>= Unit.VALUE