Delete unsightly blank line

There shouldn't really be a blank line between the opening brace of a
function and its first line of code. Let's get rid of it.

src/runtime/internal/scheduler.ts

@@ -34,7 +34,6 @@ export function add_flush_callback(fn) {
 const seen_callbacks = new Set();
 let flushidx = 0;  // Do *not* move this inside the flush() function
 export function flush() {
-
 	const saved_component = current_component;
 
 	do {