src: remove Atomics.notify alias
The version of V8 we are shipping has the alias built in, so we can remove this.
cc @nodejs/v8 @rwaldron @leobalter
Closes #21219 (closed)
Checklist
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make -j4 test
(UNIX), orvcbuild test
(Windows) passes -
tests and/or benchmarks are included -
commit message follows commit guidelines