Revert change to function

Author: joehoyle

src/zend/function.rs

@@ -2,7 +2,7 @@
 
 use std::{fmt::Debug, os::raw::c_char, ptr};
 
-use crate::{ffi::{zend_function_entry, zend_function}, flags::FunctionType};
+use crate::ffi::zend_function_entry;
 
 /// A Zend function entry.
 pub type FunctionEntry = zend_function_entry;
@@ -36,11 +36,3 @@ impl FunctionEntry {
         Box::into_raw(Box::new(self))
     }
 }
-
-pub type Function = zend_function;
-
-impl Function {
-    pub fn type_(&self) -> FunctionType {
-        FunctionType::from(unsafe { self.type_ })
-    }
-}