Revert "tint: rhs of left shift is always u32 or vector of u32"

This reverts commit cc9ae5cae3.

Reason for revert: Kokoro failed on this CL

Original change's description:
> tint: rhs of left shift is always u32 or vector of u32
>
> Implements recent spec change:
> https://github.com/gpuweb/gpuweb/pull/3516
>
> Bug: tint:1713
> Change-Id: I678e3c15ec8ab010dca43fc814cf0bc79486f4b6
> Reviewed-on: https://dawn-review.googlesource.com/c/dawn/+/106721
> Commit-Queue: Antonio Maiorano <amaiorano@google.com>
> Reviewed-by: Dan Sinclair <dsinclair@chromium.org>

TBR=dsinclair@chromium.org,amaiorano@google.com,noreply+kokoro@google.com,dawn-scoped@luci-project-accounts.iam.gserviceaccount.com

Change-Id: I9d2337b77e2853c9e26300d0bfdbfba744c54c48
No-Presubmit: true
No-Tree-Checks: true
No-Try: true
Bug: tint:1713
Reviewed-on: https://dawn-review.googlesource.com/c/dawn/+/106847
Reviewed-by: Antonio Maiorano <amaiorano@google.com>
Reviewed-by: dan sinclair <dsinclair@google.com>
Commit-Queue: Antonio Maiorano <amaiorano@google.com>

test/tint/bug/tint/1713.wgsl

@@ -1,4 +0,0 @@
-const a = 1 << 30u; // First shift, result should be abstract
-const b = a << 10u; // Valid only if 'a' is abstract
-
-const c = 5000000000 << 3u; // Valid only if result is abtract

test/tint/bug/tint/1713.wgsl.expected.dxc.hlsl

@@ -1,5 +0,0 @@
-[numthreads(1, 1, 1)]
-void unused_entry_point() {
-  return;
-}
-

test/tint/bug/tint/1713.wgsl.expected.fxc.hlsl

@@ -1,5 +0,0 @@
-[numthreads(1, 1, 1)]
-void unused_entry_point() {
-  return;
-}
-

test/tint/bug/tint/1713.wgsl.expected.glsl

@@ -1,6 +0,0 @@
-#version 310 es
-
-layout(local_size_x = 1, local_size_y = 1, local_size_z = 1) in;
-void unused_entry_point() {
-  return;
-}

test/tint/bug/tint/1713.wgsl.expected.msl

@@ -1,3 +0,0 @@
-#include <metal_stdlib>
-
-using namespace metal;

test/tint/bug/tint/1713.wgsl.expected.spvasm

@@ -1,16 +0,0 @@
-; SPIR-V
-; Version: 1.3
-; Generator: Google Tint Compiler; 0
-; Bound: 5
-; Schema: 0
-               OpCapability Shader
-               OpMemoryModel Logical GLSL450
-               OpEntryPoint GLCompute %unused_entry_point "unused_entry_point"
-               OpExecutionMode %unused_entry_point LocalSize 1 1 1
-               OpName %unused_entry_point "unused_entry_point"
-       %void = OpTypeVoid
-          %1 = OpTypeFunction %void
-%unused_entry_point = OpFunction %void None %1
-          %4 = OpLabel
-               OpReturn
-               OpFunctionEnd

test/tint/bug/tint/1713.wgsl.expected.wgsl

@@ -1,5 +0,0 @@
-const a = (1 << 30u);
-
-const b = (a << 10u);
-
-const c = (5000000000 << 3u);