remove use of 'subgroup_branching' diagnostic (#4478)

That was part of the original subgroups proposal, but was removed.

Author: dneto0

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

@@ -330,7 +330,6 @@ predication filters are skipped.
 enable subgroups;
 
 diagnostic(off, subgroup_uniformity);
-diagnostic(off, subgroup_branching);
 
 @group(0) @binding(0)
 var<storage> inputs : u32; // unused

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

@@ -349,7 +349,6 @@ predication filters are skipped.
 enable subgroups;
 
 diagnostic(off, subgroup_uniformity);
-diagnostic(off, subgroup_branching);
 
 @group(0) @binding(0)
 var<storage> inputs : u32; // unused

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

@@ -305,7 +305,6 @@ g.test('compute,split')
 enable subgroups;
 
 diagnostic(off, subgroup_uniformity);
-diagnostic(off, subgroup_branching);
 
 @group(0) @binding(0)
 var<storage> input : array<u32>;

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

@@ -204,7 +204,6 @@ g.test('compute,split')
 enable subgroups;
 
 diagnostic(off, subgroup_uniformity);
-diagnostic(off, subgroup_branching);
 
 @group(0) @binding(0)
 var<storage> inputs : array<u32>;

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

@@ -204,7 +204,6 @@ g.test('compute,split')
 enable subgroups;
 
 diagnostic(off, subgroup_uniformity);
-diagnostic(off, subgroup_branching);
 
 @group(0) @binding(0)
 var<storage> inputs : array<u32>;

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

@@ -192,7 +192,6 @@ g.test('compute,split')
 enable subgroups;
 
 diagnostic(off, subgroup_uniformity);
-diagnostic(off, subgroup_branching);
 
 @group(0) @binding(0)
 var<storage, read_write> size : u32;
@@ -228,7 +227,6 @@ g.test('predicate')
     const wgsl = `
 enable subgroups;
 
-diagnostic(off, subgroup_branching);
 
 @group(0) @binding(0)
 var<storage, read_write> size : u32;
@@ -317,7 +315,6 @@ g.test('predicate_and_control_flow')
     const wgsl = `
 enable subgroups;
 
-diagnostic(off, subgroup_branching);
 diagnostic(off, subgroup_uniformity);
 
 @group(0) @binding(0)

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

@@ -372,7 +372,6 @@ g.test('compute,split')
 enable subgroups;
 
 diagnostic(off, subgroup_uniformity);
-diagnostic(off, subgroup_branching);
 
 @group(0) @binding(0)
 var<storage> inputs : array<u32>;

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

@@ -196,7 +196,6 @@ g.test('workgroup_uniform_load')
     const wgsl = `
 enable subgroups;
 
-diagnostic(off, subgroup_branching);
 
 var<workgroup> wgmem : u32;
 

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

@@ -330,7 +330,6 @@ g.test('compute,split')
 enable subgroups;
 
 diagnostic(off, subgroup_uniformity);
-diagnostic(off, subgroup_branching);
 
 @group(0) @binding(0)
 var<storage> input : array<u32>;