Remove parentheses after deleting the last unused constructor parameter

So #KT-16636 Fixed

idea/testData/quickfix/changeSignature/removeUnusedPrimaryConstructorParameter.kt

@@ -0,0 +1,3 @@
+// "Remove parameter 'a'" "true"
+
+class Foo(<caret>a: String)

idea/testData/quickfix/changeSignature/removeUnusedPrimaryConstructorParameter.kt.after

@@ -0,0 +1,3 @@
+// "Remove parameter 'a'" "true"
+
+class Foo<caret>

idea/testData/quickfix/changeSignature/removeUnusedPrimaryConstructorParameter2.kt

@@ -0,0 +1,3 @@
+// "Remove parameter 'a'" "true"
+
+class Foo(<caret>a: String, b: String)

idea/testData/quickfix/changeSignature/removeUnusedPrimaryConstructorParameter2.kt.after

@@ -0,0 +1,3 @@
+// "Remove parameter 'a'" "true"
+
+class Foo(<caret>b: String)