Remove webpack.*.ts importing values from src/ (#4992)

types/mocks.d.ts

@@ -8,9 +8,6 @@ declare module "win-ca/api"
 declare module "@hapi/call"
 declare module "@hapi/subtext"
 
-// Global path to static assets
-declare const __static: string;
-
 // Support import for custom module extensions
 // https://www.typescriptlang.org/docs/handbook/modules.html#wildcard-module-declarations
 declare module "*.module.scss" {