test: remove package-wide import assumptions

test/wcc/data/r989_trycallcollide_control/case.ww

@@ -1,13 +1,13 @@
 //ww:run-exit 42
 package main;
 package beta;
+import gamma;
 export type berr = !void;
 export fn op() (i32 | berr) = { return 5; };
-export fn user() (i32 | berr) = { let v: i32 = op()?; return v + 37; };
+export fn user() (i32 | berr) = { let _ = gamma.other(); let v: i32 = op()?; return v + 37; };
 package gamma;
 export type gerr1 = !void;
 export fn other() (i32 | gerr1) = { return 0; };
 package main;
 import beta;
-import gamma;
 fn main() int = { match (beta.user()) { case let n: i32 => return n: int; case berr => return 99; }; };