remove repeated test

Author: syyongx

php_test.go

@@ -294,13 +294,6 @@ func TestFile(t *testing.T) {
 }
 
 func TestVariable(t *testing.T) {
-	equal(t, true, Empty(""))
-	equal(t, true, Empty(0))
-	equal(t, true, Empty(0.0))
-	equal(t, true, Empty(false))
-	equal(t, false, Empty([1]string{}))
-	equal(t, true, Empty([]int{}))
-
 	var tIsNumeric bool
 
 	tIsNumeric = IsNumeric("-0xaF")