Revert "use interface add hash function"

builtin_packages/.prajna

@@ -41,7 +41,6 @@ use string::String;
 
 use serializable::Serializable;
 use serialize;
-use hash::Hashable;
 
 func ExitWithMessage(msg: String) {
     msg.PrintLine();

builtin_packages/float.prajna

@@ -190,4 +190,3 @@ implement FloatScientificPrinter<FloatType> {
         return str_re;
     }
 }
-

builtin_packages/int.prajna

@@ -1,3 +1,5 @@
+
+
 template <Bits>
 implement Uint<Bits> {
     @static
@@ -25,6 +27,3 @@ implement Int<Bits> {
         return !Int<Bits>::Max();
     }
 }
-
-
-

builtin_packages/primitive_type.prajna

@@ -292,3 +292,5 @@ use NegativeAndPositiveTemplate2<char>;
 // use ComparableTemplate2<bool>;
 use LogicalableTemplate2<bool>;
 
+
+

tests/prajna_sources/special_statement_test.prajna

@@ -1,14 +1,26 @@
-@test
-func Test1() {
-    3i64.Hash().ToString().PrintLine();
-    2i32.Hash().ToString().PrintLine();
+template <T>
+struct Hash{}
+
+template <T>
+implement Hash<T> {
+    func __call__(v: T)->i64 {
+        return 1;
+    }
+}
+
+implement Hash<i64> {
+    func __call__(v: i64)->i64 {
+        return v;
+    }
+}
 
-    4.0f64.Hash().ToString().PrintLine();
-    3.1f32.Hash().ToString().PrintLine();
 
-    'b'.Hash().ToString().PrintLine();
-    "hello".Hash().ToString().PrintLine();
-    true.Hash().ToString().PrintLine();
+@test
+func Test1() {
+    var tmp: Hash<i64>;
+    tmp(3).PrintLine();
+    var tmp2: Hash<f32>;
+    tmp2(3.0f32).PrintLine();
 }