Revert "Add specific error message for 0 byte project data"

This reverts commit f9919fe.

The bug in #528 has been identified as something else.

Author: GarboMuffin

src/packager/packager.js

@@ -851,10 +851,6 @@ cd "$(dirname "$0")"
   }
 
   async generateGetProjectData () {
-    if (this.project.arrayBuffer.byteLength === 0) {
-      throw new Error('Project data has 0 bytes');
-    }
-
     let result = '';
     let getProjectDataFunction = '';
     let isZip = false;