refact: clean up global typings

custom.d.ts

@@ -1,4 +0,0 @@
-declare module "*.svg" {
-  const content: any;
-  export default content;
-}

typings.d.ts

@@ -1,7 +1,10 @@
 import { ITheme } from "./src/design/themes"
 import "styled-components"
 
-declare module "*.svg"
+declare module "*.svg" {
+  const content: any
+  export default content
+}
 declare module "*.png"
 declare module "*.json"