move a bunch of tests

src/test/ui/cast/unsupported-cast.rs

@@ -0,0 +1,5 @@
+struct A;
+
+fn main() {
+  println!("{:?}", 1.0 as *const A); //~ERROR  casting `f64` as `*const A` is invalid
+}

src/test/ui/cast/unsupported-cast.stderr

@@ -1,7 +1,7 @@
 error[E0606]: casting `f64` as `*const A` is invalid
-  --> $DIR/unsupported-cast.rs:6:20
+  --> $DIR/unsupported-cast.rs:4:20
    |
-LL |   println!("{:?}", 1.0 as *const A); // Can't cast float to foreign.
+LL |   println!("{:?}", 1.0 as *const A);
    |                    ^^^^^^^^^^^^^^^
 
 error: aborting due to previous error

src/test/ui/unsupported-cast.rs

@@ -1,7 +0,0 @@
-// error-pattern:casting
-
-struct A;
-
-fn main() {
-  println!("{:?}", 1.0 as *const A); // Can't cast float to foreign.
-}