Remove Wasm JS support

[JakeWharton]

It has weird testing flakes that should be impossible.

This reverts commit 7db3477

---

• CHANGELOG.md's "Unreleased" section has been updated, if applicable.

[JakeWharton]

Here's one:

app.cash.redwood.protocol.guest.GuestProtocolAdapterTest.modifierDefaultValueNotSerialized[wasmJs, node] FAILED
    AssertionFailedError: expected:<..."customType":"PT10S"[]})])]> but was:<..."customType":"PT10S"[,"string":"sup"]})])]>
        at kotlin.captureStackTrace(file:///Users/runner/work/redwood/redwood/build/js/packages/redwood-redwood-protocol-guest-wasm-js-test/kotlin/redwood-redwood-protocol-guest-wasm-js-test.uninstantiated.mjs:16)
        at <app.cash.redwood:redwood-protocol-guest_test>.kotlin.captureStackTrace__externalAdapter(wasm://wasm/<app.cash.redwood:redwood-protocol-guest_test>-0185a1c6)
        at <app.cash.redwood:redwood-protocol-guest_test>.kotlin.Throwable.<init>(wasm://wasm/<app.cash.redwood:redwood-protocol-guest_test>-0185a1c6)
        at <app.cash.redwood:redwood-protocol-guest_test>.kotlin.Throwable.<init>(wasm://wasm/<app.cash.redwood:redwood-protocol-guest_test>-0185a1c6)
        at <app.cash.redwood:redwood-protocol-guest_test>.kotlin.Error.<init>(wasm://wasm/<app.cash.redwood:redwood-protocol-guest_test>-0185a1c6)
        at <app.cash.redwood:redwood-protocol-guest_test>.kotlin.AssertionError.<init>(wasm://wasm/<app.cash.redwood:redwood-protocol-guest_test>-0185a1c6)
        at <app.cash.redwood:redwood-protocol-guest_test>.com.willowtreeapps.opentest4k.AssertionFailedError.<init>(wasm://wasm/<app.cash.redwood:redwood-protocol-guest_test>-0185a1c6)
        at <app.cash.redwood:redwood-protocol-guest_test>.com.willowtreeapps.opentest4k.AssertionFailedError.<init>(wasm://wasm/<app.cash.redwood:redwood-protocol-guest_test>-0185a1c6)
        at <app.cash.redwood:redwood-protocol-guest_test>.assertk.fail(wasm://wasm/<app.cash.redwood:redwood-protocol-guest_test>-0185a1c6)
        at <app.cash.redwood:redwood-protocol-guest_test>.assertk.assertions.support.expected(wasm://wasm/<app.cash.redwood:redwood-protocol-guest_test>-0185a1c6)