Remove redundant main/crate_types

Author: Alexendoo

ices/109141.rs

@@ -1,5 +1,4 @@
 #![feature(generic_const_exprs)]
-pub fn main() {}
 
 impl EntriesBuffer {
     fn a(&self) -> impl Iterator {

ices/109144.rs

@@ -1,5 +1,3 @@
 #![crate_type = "lib"]
 #[link(kind = "static", modifiers = "+whole-archive,+bundle")]
 extern "C" {}
-
-fn main() {}

ices/109152.rs

@@ -1,4 +1,3 @@
-#![crate_type = "lib"]
 fn _y() {
     vec![42].iter().map(drop);
 }