moved & deleted tests

opeq.rs was removed as duplicating test logic in other tests

tests/ui/opeq.rs

@@ -1,17 +0,0 @@
-//@ run-pass
-
-pub fn main() {
-    let mut x: isize = 1;
-    x *= 2;
-    println!("{}", x);
-    assert_eq!(x, 2);
-    x += 3;
-    println!("{}", x);
-    assert_eq!(x, 5);
-    x *= x;
-    println!("{}", x);
-    assert_eq!(x, 25);
-    x /= 5;
-    println!("{}", x);
-    assert_eq!(x, 5);
-}