Don't throw "token not found"

src/patcher/paragraph-split-inject.ts

@@ -19,8 +19,6 @@ export const findRunElementIndexWithToken = (paragraphElement: Element, token: s
             }
         }
     }
-
-    throw new Error("Token not found");
 };
 
 export const splitRunElement = (runElement: Element, token: string): { readonly left: Element; readonly right: Element } => {