Revert "[wasm] Improve test coverage of s128 exception handling."

This reverts commit 837556be.

Reason for revert: Breaks V8 Linux https://cr-buildbucket.appspot.com/build/8896896548394462912

Original change's description:
> [wasm] Improve test coverage of s128 exception handling.
> 
> This adds test coverage for the encoding and decoding of s128 values as
> part of an exception package. The encoding within an exception package
> is not specified (and not observable), but the full bit-pattern needs to
> survive an encoding/decoding round trip.
> 
> R=​clemensb@chromium.org
> TEST=mjsunit/wasm/exceptions-simd
> BUG=v8:8091
> 
> Change-Id: I4cf6c1f00c64757512f66d068640a7e772eb0127
> Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/1905769
> Commit-Queue: Michael Starzinger <mstarzinger@chromium.org>
> Reviewed-by: Clemens Backes <clemensb@chromium.org>
> Cr-Commit-Position: refs/heads/master@{#64932}

TBR=mstarzinger@chromium.org,clemensb@chromium.org

Change-Id: I9276c6f6600a0f4e8a06dd1a7907cac25c761577
No-Presubmit: true
No-Tree-Checks: true
No-Try: true
Bug: v8:8091
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/1914211Reviewed-by: Maya Lekova <mslekova@chromium.org>
Commit-Queue: Maya Lekova <mslekova@chromium.org>
Cr-Commit-Position: refs/heads/master@{#64935}

test/mjsunit/wasm/exceptions-simd.js

@@ -38,44 +38,13 @@ load("test/mjsunit/wasm/exceptions-utils.js");
           kExprBrOnExn, 0, except,
           kExprRethrow,
         kExprEnd,
-        kExprLocalGet, 0,
-        kSimdPrefix, kExprI32x4Eq,
-        kSimdPrefix, kExprS1x4AllTrue,
+        // TODO(mstarzinger): Actually return some compressed form of the s128
+        // value here to make sure it is extracted properly from the exception.
+        kExprDrop,
+        kExprI32Const, 1,
       ])
       .exportFunc();
   var instance = builder.instantiate();
 
   assertEquals(1, instance.exports.throw_catch_simd());
 })();
-
-(function TestThrowCatchS128WithValue() {
-  var builder = new WasmModuleBuilder();
-  var kSig_v_s = makeSig([kWasmS128], []);
-  var except = builder.addException(kSig_v_s);
-  const in_idx = 0x10;   // Input index in memory.
-  const out_idx = 0x20;  // Output index in memory.
-  builder.addImportedMemory("env", "memory");
-  builder.addFunction("throw_catch_simd", kSig_v_v)
-      .addBody([
-        kExprI32Const, out_idx,
-        kExprTry, kWasmS128,
-          kExprI32Const, in_idx,
-          kSimdPrefix, kExprS128LoadMem, 0, 0,
-          kExprThrow, 0,
-        kExprCatch,
-          kExprBrOnExn, 0, except,
-          kExprRethrow,
-        kExprEnd,
-        kSimdPrefix, kExprS128StoreMem, 0, 0,
-      ])
-      .exportFunc();
-  var memory = new WebAssembly.Memory({initial: 1});
-  var instance = builder.instantiate({env: {memory:memory}});
-
-  var ref = [0x01, 0x12, 0x23, 0x34, 0x45, 0x56, 0x67, 0x78,
-             0x89, 0x9a, 0xab, 0xbc, 0xcd, 0xde, 0xef, 0xf0];
-  var array = new Uint8Array(memory.buffer);
-  array.set(ref, in_idx);  // Store reference value in memory.
-  instance.exports.throw_catch_simd();
-  assertArrayEquals(ref, array.slice(out_idx, out_idx + 0x10));
-})();

test/mjsunit/wasm/wasm-module-builder.js

@@ -468,8 +468,6 @@ let kExprI64AtomicCompareExchange32U = 0x4e;
 let kExprS128LoadMem = 0x00;
 let kExprS128StoreMem = 0x01;
 let kExprI32x4Splat = 0x0c;
-let kExprI32x4Eq = 0x2c;
-let kExprS1x4AllTrue = 0x75;
 let kExprF32x4Min = 0x9e;
 
 // Compilation hint constants.