Remove duplicate code for parsing numbers.

server/shared/utils/strings.ts

@@ -1,7 +1,7 @@
 /**
  * Utility functions all around strings.
  */
-import { isInteger, type MAC } from "../types";
+import type { MAC } from "../types";
 
 /**
  * Trims the given `string` and replaces multiple whitespaces by one space each.
@@ -39,31 +39,3 @@ export function normalizeMac(mac: MAC): MAC {
 
     return macParts.join(":") as MAC;
 }
-
-/**
- * Parses the given `string` and converts it into an integer.
- *
- * For a `string` to be considered a valid representation of an integer `number` it has to satisfy the
- * following criteria:
- *
- * * The integer is base `10`.
- * * The `string` starts with an optional `+` or `-` sign followed by one or more digits.
- * * The first digit must not be `0`.
- * * The `string` does not contain any other characters.
- *
- * @param str - `string` to parse.
- * @returns The parsed integer `number`.
- * @throws {@link SyntaxError} - If the given `string` does not represent a valid integer.
- */
-export function parseInteger(str: string): number {
-    const parsed = parseInt(str, 10);
-    const original = str.startsWith("+") ? str.slice(1) : str;
-
-    if (isInteger(parsed) && parsed.toString() === original) {
-        return parsed;
-    } else {
-        throw new SyntaxError(
-            `String does not represent a valid integer: "${str}"`
-        );
-    }
-}