Fixup tests

The drop glue for `i8` is no longer generated as a trans item

Author: Aatch

src/test/codegen-units/item-collection/impl-in-non-instantiated-generic.rs

@@ -32,5 +32,3 @@ pub fn generic_function<T>(x: T) -> (T, i32) {
 fn main() {
     0i64.foo();
 }
-
-//~ TRANS_ITEM drop-glue i8

src/test/codegen-units/item-collection/non-generic-closures.rs

@@ -59,5 +59,3 @@ fn main() {
 fn run_closure(f: &Fn(i32)) {
     f(3);
 }
-
-//~ TRANS_ITEM drop-glue i8

src/test/codegen-units/item-collection/statics-and-consts.rs

@@ -60,5 +60,3 @@ fn main() {
 //~ TRANS_ITEM static statics_and_consts::foo[0]::STATIC2[2]
 
 //~ TRANS_ITEM fn statics_and_consts::main[0]
-
-//~ TRANS_ITEM drop-glue i8