Remove the sharedarraybuffer flag

From my understanding, this was needed for the wasm FFMPEG, which we are no
longer using when running as the desktop app.

desktop/src/main.ts

@@ -87,10 +87,6 @@ const logStartupBanner = () => {
     log.info("Running on", { platform, osRelease, systemVersion });
 };
 
-function enableSharedArrayBufferSupport() {
-    app.commandLine.appendSwitch("enable-features", "SharedArrayBuffer");
-}
-
 /**
  * [Note: Increased disk cache for the desktop app]
  *