zlib: remove unneeded bbappend
zlib: remove unneeded bbappend

Signed-off-by: Derek Straka <e1c79a582b6629e6b39e9679f4bb964d25db4aa8@asterius.io>

meta-rust/meta-rust,cardoe/meta-rust,meta-rust/meta-rust,cardoe/meta-rust,jmesmon/meta-rust,cardoe/meta-rust,meta-rust/meta-rust,meta-rust/meta-rust,jmesmon/meta-rust,jmesmon/meta-rust,cardoe/meta-rust,jmesmon/meta-rust,starlab-io/meta-rust,meta-rust/meta-rust,starlab-io/meta-rust