Remove unused import

src/scripts/index.ts

@@ -9,4 +9,4 @@ export { default as GenomeBrowser } from "./component/genome-browser";
 export { default as SelectedChromosome } from "./component/selected-chromosome";
 
 // layout
-export { default as LinearGene } from "./layout/linear-gene";
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+export { default as linearGene } from "./layout/linear-gene";
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