chore: remove unused gcd() export from mathUtil.ts

Remove the public export of gcd() — no production consumer exists.
The function is retained as a private helper for lcm() which is
used by nodeDefUtil.ts. Corresponding gcd tests are removed.

Fixes #11082

src/utils/mathUtil.test.ts

@@ -4,7 +4,6 @@ import type { ReadOnlyRect } from '@/lib/litegraph/src/interfaces'
 import {
   computeUnionBounds,
   denormalize,
-  gcd,
   lcm,
   normalize
 } from '@/utils/mathUtil'
@@ -34,29 +33,6 @@ describe('mathUtil', () => {
     })
   })
 
-  describe('gcd', () => {
-    it('should compute greatest common divisor correctly', () => {
-      expect(gcd(48, 18)).toBe(6)
-      expect(gcd(100, 25)).toBe(25)
-      expect(gcd(17, 13)).toBe(1)
-      expect(gcd(0, 5)).toBe(5)
-      expect(gcd(5, 0)).toBe(5)
-    })
-
-    it('should handle negative numbers', () => {
-      expect(gcd(-48, 18)).toBe(6)
-      expect(gcd(48, -18)).toBe(6)
-      expect(gcd(-48, -18)).toBe(6)
-    })
-
-    it('should not cause stack overflow with small floating-point step values', () => {
-      // This would cause Maximum call stack size exceeded with recursive impl
-      // when used in lcm calculations with small step values
-      expect(() => gcd(0.0001, 0.0003)).not.toThrow()
-      expect(() => gcd(1e-10, 1e-9)).not.toThrow()
-    })
-  })
-
   describe('lcm', () => {
     it('should compute least common multiple correctly', () => {
       expect(lcm(4, 6)).toBe(12)

src/utils/mathUtil.ts

@@ -35,7 +35,7 @@ type Vec2 = readonly [number, number]
  * @param b - The second number.
  * @returns The GCD of the two numbers.
  */
-export const gcd = (a: number, b: number): number => {
+const gcd = (a: number, b: number): number => {
   // Use absolute values to handle negative numbers
   let x = Math.abs(a)
   let y = Math.abs(b)