derivative: do not implicitly turn on OpCapability DerivativeControl, fix warnings

Author: Firestar99

crates/spirv-std/src/arch/derivative.rs

@@ -3,9 +3,9 @@ use glam::{Vec2, Vec3, Vec3A, Vec4};
 
 macro_rules! cap_deriv_control {
     () => {
-        unsafe {
-            core::arch::asm!("OpCapability DerivativeControl");
-        }
+        // unsafe {
+        //     core::arch::asm!("OpCapability DerivativeControl");
+        // }
     };
 }