avoids emitting duplicate import declarations in case of multiple type imports

src/transform.ts

@@ -655,6 +655,10 @@ export const transform = {
 
       if (replacementNode != null) {
         if (Array.isArray(replacementNode)) {
+          // Fixes https://github.com/Khan/flow-to-ts/issues/281
+          // Imports with multiple types will be moved to their own node leaving the source node without specifiers;
+          // do not print it as it will result in an import declaration without specifiers
+          replacementNode = replacementNode.filter((x) => x.specifiers.length);
           path.replaceWithMultiple(replacementNode);
         } else {
           path.replaceWith(replacementNode);