Rust: remove accidental test source file

rust/ql/test/extractor-tests/generated/Function/function.rs

@@ -1,11 +0,0 @@
-// generated by codegen
-
-fn my_test<'a, 'b, T: Eq>(x: &'a [T], y: &'b [T]) -> &'a [T] {
-    // A function declaration. For example
-    fn foo(x: u32) -> u64 { (x + 1).into()
-     }
-    // A function declaration within a trait might not have a body:
-    trait Trait {
-        fn bar();
-    }
-}