wgsl: Revert changes to round execution tests

These were landed on the wrong branch, and are causing tests to fail
to build, because some of the code that they depend on is implemented
in a PR that hasn't landed yet.

src/webgpu/shader/execution/expression/call/builtin/round.spec.ts

@@ -12,13 +12,13 @@ Component-wise when T is a vector.
 
 import { makeTestGroup } from '../../../../../../common/framework/test_group.js';
 import { GPUTest } from '../../../../../gpu_test.js';
-import { TypeF32, TypeF16, TypeAbstractFloat } from '../../../../../util/conversion.js';
+import { TypeF32, TypeF16 } from '../../../../../util/conversion.js';
 import { FP } from '../../../../../util/floating_point.js';
-import { fullF32Range, fullF16Range, fullF64Range } from '../../../../../util/math.js';
+import { fullF32Range, fullF16Range } from '../../../../../util/math.js';
 import { makeCaseCache } from '../../case_cache.js';
-import { allInputSources, onlyConstInputSource, run } from '../../expression.js';
+import { allInputSources, run } from '../../expression.js';
 
-import { abstractBuiltin, builtin } from './builtin.js';
+import { builtin } from './builtin.js';
 
 export const g = makeTestGroup(GPUTest);
 
@@ -43,30 +43,15 @@ export const d = makeCaseCache('round', {
       FP.f16.roundInterval
     );
   },
-  abstract: () => {
-    return FP.abstract.generateScalarToIntervalCases(
-      [
-        0x8000_0000_0000_0000, // https://github.com/gpuweb/cts/issues/2766
-        ...fullF64Range(),
-      ],
-      'unfiltered',
-      FP.abstract.roundInterval
-    );
-  },
 });
 
 g.test('abstract_float')
   .specURL('https://www.w3.org/TR/WGSL/#float-builtin-functions')
   .desc(`abstract float tests`)
   .params(u =>
-    u
-      .combine('inputSource', onlyConstInputSource)
-      .combine('vectorize', [undefined, 2, 3, 4] as const)
+    u.combine('inputSource', allInputSources).combine('vectorize', [undefined, 2, 3, 4] as const)
   )
-  .fn(async t => {
-    const cases = await d.get('abstract');
-    await run(t, abstractBuiltin('round'), [TypeAbstractFloat], TypeAbstractFloat, t.params, cases);
-  });
+  .unimplemented();
 
 g.test('f32')
   .specURL('https://www.w3.org/TR/WGSL/#float-builtin-functions')