Unused variable warning in pagefind_web/src/lib.rs

[tenax66]

Hi,
When building pagefind_web by ./local_build.sh, I encountered warnings about unused variables in the src/lib.rs file.

[INFO]: 🌀  Compiling to Wasm...
   Compiling pagefind_web v0.0.0 (/**/pagefind/pagefind_web)
warning: unused variable: `e`
   --> src/lib.rs:118:13
    |
118 |         Err(e) => {
    |             ^ help: if this is intentional, prefix it with an underscore: `_e`
    |
    = note: `#[warn(unused_variables)]` on by default

warning: unused variable: `e`
   --> src/lib.rs:174:13
    |
174 |         Err(e) => {
    |             ^ help: if this is intentional, prefix it with an underscore: `_e`

warning: unused variable: `e`
   --> src/lib.rs:188:13
    |
188 |         Err(e) => {
    |             ^ help: if this is intentional, prefix it with an underscore: `_e`

The warnings are caused by the usage of e as shown below:

Err(e) => {
    debug!({ format!("{:#?}", e) });
    std::ptr::null_mut::<SearchIndex>()
}

Avoiding warnings while keeping this implementation simple may be a little difficult. It may be acceptable to add #[allow(unused_variables)] to suppress warnings.
I can create a PR to address the issue. Thank you