[test] Remove node/v8 memory64 flags. NFC

In the latest versions of node and v8 memory64 is not longer
experimental.

In the older versions, the experimental memory64 support is not
compatible with the latest emscripten-generated memory64 modules (e.g.
table64 is completely missing).

.circleci/config.yml

@@ -312,7 +312,7 @@ commands:
             # this flag for now: https://crbug.com/638180
             CHROME_FLAGS_BASE: "--no-first-run -start-maximized --no-sandbox --use-gl=swiftshader --user-data-dir=/tmp/chrome-emscripten-profile --enable-experimental-web-platform-features"
             CHROME_FLAGS_HEADLESS: "--headless=new --remote-debugging-port=1234"
-            CHROME_FLAGS_WASM: "--enable-experimental-webassembly-features --js-flags=\"--experimental-wasm-memory64 --experimental-wasm-stack-switching --experimental-wasm-type-reflection\""
+            CHROME_FLAGS_WASM: "--enable-experimental-webassembly-features --js-flags=\"--experimental-wasm-stack-switching --experimental-wasm-type-reflection\""
             CHROME_FLAGS_NOCACHE: "--disk-cache-dir=/dev/null --disk-cache-size=1 --media-cache-size=1 --disable-application-cache --incognito"
           command: |
             export EMTEST_BROWSER="/usr/bin/google-chrome $CHROME_FLAGS_BASE $CHROME_FLAGS_HEADLESS $CHROME_FLAGS_WASM $CHROME_FLAGS_NOCACHE"
@@ -402,7 +402,7 @@ commands:
             # this flag for now: https://crbug.com/638180
             CHROME_FLAGS_BASE: "--no-first-run -start-maximized --no-sandbox --use-gl=swiftshader --user-data-dir=/tmp/chrome-emscripten-profile"
             CHROME_FLAGS_HEADLESS: "--headless=new --remote-debugging-port=1234"
-            CHROME_FLAGS_WASM: "--enable-experimental-webassembly-features --js-flags=\"--experimental-wasm-memory64\""
+            CHROME_FLAGS_WASM: "--enable-experimental-webassembly-features"
             CHROME_FLAGS_NOCACHE: "--disk-cache-dir=/dev/null --disk-cache-size=1 --media-cache-size=1 --disable-application-cache --incognito"
           command: |
             export EMTEST_BROWSER="/usr/bin/google-chrome $CHROME_FLAGS_BASE $CHROME_FLAGS_HEADLESS $CHROME_FLAGS_WASM $CHROME_FLAGS_NOCACHE"

test/common.py

@@ -964,13 +964,11 @@ def require_wasm64(self):
       version = shared.get_node_version(nodejs)
       if version >= (23, 0, 0):
         self.js_engines = [nodejs]
-        self.node_args += shared.node_memory64_flags()
         return
 
     if config.V8_ENGINE and config.V8_ENGINE in self.js_engines:
       self.emcc_args.append('-sENVIRONMENT=shell')
       self.js_engines = [config.V8_ENGINE]
-      self.v8_args.append('--experimental-wasm-memory64')
       return
 
     if 'EMTEST_SKIP_WASM64' in os.environ:

tools/link.py

@@ -449,9 +449,7 @@ def check_human_readable_list(items):
 def make_js_executable(script):
   src = read_file(script)
   cmd = config.NODE_JS
-  if settings.MEMORY64 == 1:
-    cmd += shared.node_memory64_flags()
-  elif settings.WASM_BIGINT:
+  if settings.WASM_BIGINT:
     cmd += shared.node_bigint_flags(config.NODE_JS)
   if len(cmd) > 1 or not os.path.isabs(cmd[0]):
     # Using -S (--split-string) here means that arguments to the executable are

tools/shared.py

@@ -394,10 +394,6 @@ def node_reference_types_flags(nodejs):
     return []
 
 
-def node_memory64_flags():
-  return ['--experimental-wasm-memory64']
-
-
 def node_exception_flags(nodejs):
   node_version = get_node_version(nodejs)
   # Exception handling was enabled by default in node v17.