Avoid unnecessary conversions

No need to convert values here.

assert/assertions.go

@@ -1092,7 +1092,7 @@ func toFloat(x interface{}) (float64, bool) {
 	case float32:
 		xf = float64(xn)
 	case float64:
-		xf = float64(xn)
+		xf = xn
 	case time.Duration:
 		xf = float64(xn)
 	default:

assert/assertions_test.go

@@ -74,11 +74,11 @@ var (
 		[1]interface{}{1},
 		[]interface{}{},
 		struct{ x int }{1},
-		(*interface{})(&i),
-		(func())(func() {}),
+		(&i),
+		(func() {}),
 		interface{}(1),
 		map[interface{}]interface{}{},
-		(chan interface{})(make(chan interface{})),
+		(make(chan interface{})),
 		(<-chan interface{})(make(chan interface{})),
 		(chan<- interface{})(make(chan interface{})),
 	}