remove key from __beginUnsafe

Author: mkandil

stdlib/public/Cxx/CxxDictionary.swift

@@ -30,7 +30,7 @@ public protocol CxxDictionary<Key, Value> {
 
   /// Do not implement this function manually in Swift.
   func __beginUnsafe() -> RawIterator
-  
+
   /// Do not implement this function manually in Swift.
   mutating func __findMutatingUnsafe(_ key: Key) -> RawMutableIterator
 
@@ -80,7 +80,7 @@ extension CxxDictionary {
     _ isIncluded: (_ key: Key, _ value: Value) throws -> Bool
 ) rethrows -> [Key: Value] {
     var filteredDictionary: [Key: Value] = [:]
-    var iterator = __beginUnsafe(Key) 
+    var iterator = __beginUnsafe() 
     let endIterator = __endUnsafe()
 
     while iterator != endIterator {