chore(circuits): remove dead code in cbind.cpp for public kernel (#2094)

Resolves #2093 

# Checklist:
Remove the checklist to signal you've completed it. Enable auto-merge if
the PR is ready to merge.
- [x] If the pull request requires a cryptography review (e.g.
cryptographic algorithm implementations) I have added the 'crypto' tag.
- [x] I have reviewed my diff in github, line by line and removed
unexpected formatting changes, testing logs, or commented-out code.
- [x] Every change is related to the PR description.
- [x] I have
[linked](https://docs.github.com/en/issues/tracking-your-work-with-issues/linking-a-pull-request-to-an-issue)
this pull request to relevant issues (if any exist).

circuits/cpp/src/aztec3/circuits/kernel/public/c_bind.cpp

@@ -23,30 +23,6 @@ using aztec3::circuits::kernel::public_kernel::native_public_kernel_circuit_publ
 
 // WASM Cbinds
 
-WASM_EXPORT size_t public_kernel__init_proving_key(uint8_t const** pk_buf)
-{
-    std::vector<uint8_t> pk_vec(42, 0);
-
-    auto* raw_buf = (uint8_t*)malloc(pk_vec.size());
-    memcpy(raw_buf, (void*)pk_vec.data(), pk_vec.size());
-    *pk_buf = raw_buf;
-
-    return pk_vec.size();
-}
-
-WASM_EXPORT size_t public_kernel__init_verification_key(uint8_t const* pk_buf, uint8_t const** vk_buf)
-{
-    std::vector<uint8_t> vk_vec(42, 0);
-    // TODO(dbanks12): remove when proving key is used
-    (void)pk_buf;  // unused
-
-    auto* raw_buf = (uint8_t*)malloc(vk_vec.size());
-    memcpy(raw_buf, (void*)vk_vec.data(), vk_vec.size());
-    *vk_buf = raw_buf;
-
-    return vk_vec.size();
-}
-
 CBIND(public_kernel__sim, [](PublicKernelInputs<NT> public_kernel_inputs) {
     DummyBuilder builder = DummyBuilder("public_kernel__sim");
     KernelCircuitPublicInputs<NT> const result =

circuits/cpp/src/aztec3/circuits/kernel/public/c_bind.h

@@ -3,6 +3,4 @@
 #include <cstddef>
 #include <cstdint>
 
-WASM_EXPORT size_t public_kernel__init_proving_key(uint8_t const** pk_buf);
-WASM_EXPORT size_t public_kernel__init_verification_key(uint8_t const* pk_buf, uint8_t const** vk_buf);
 CBIND_DECL(public_kernel__sim);