removing the need for panic and _start snippets in user space binaries

system/services/fdt/fdt.zig

@@ -28,8 +28,3 @@ pub fn main(init: runtime.process.Init) void {
     // supervisor reads a clean exit as "meant to stop" — correct for a
     // placeholder.
 }
-
-pub const panic = runtime.panic;
-comptime {
-    _ = &runtime.start._start; // pull the runtime entry shim into the image
-}