removed fallback for platformName

Author: bs-shobhitkumar

percy/providers/genericProvider.js

@@ -249,7 +249,7 @@ class GenericProvider {
         const element = elements[index];
 
         const capabilities = await this.driver.getCapabilities();
-        const PLATFORM_NAME = (capabilities.platformName || '').toLowerCase();
+        const PLATFORM_NAME = capabilities.platformName.toLowerCase();
 
         if (PLATFORM_NAME === 'android') {
           // Android identifiers

test/percy/providers/genericProvider.test.mjs

@@ -222,24 +222,6 @@ describe('GenericProvider', () => {
         expect(elementsArray).toEqual([{}]);
       });
 
-      it('should handle missing platformName in capabilities', async () => {
-        mockDriver.getCapabilities.and.resolveTo({});
-        const elementsArray = [];
-        mockElement = {
-          getAttribute: jasmine.createSpy('getAttribute')
-            .and.returnValue('some-value')
-        };
-
-        await provider.getRegionsByElements.call(
-          { driver: mockDriver, getRegionObject: getRegionObjectSpy },
-          elementsArray,
-          [mockElement]
-        );
-
-        expect(getRegionObjectSpy).toHaveBeenCalledTimes(1);
-        expect(getRegionObjectSpy.calls.argsFor(0)[0]).toBe('element: 0');
-        expect(elementsArray).toEqual([{}]);
-      });
       describe('Android', () => {
         beforeEach(() => {
           mockDriver.getCapabilities.and.resolveTo({ platformName: 'android' });