debian-packaging: remove http conditional on url error

The url crate is always enabled. And we use it in non-conditional
code. We need the error variant to always be present.

While we're here add CI coverage for building with no default
features to keep us honest.

.github/workflows/workspace.yml

@@ -49,6 +49,7 @@ jobs:
           RUSTC_WRAPPER: sccache
         run: |
           rustc --version
+          cargo build --workspace --no-default-features
           cargo build --workspace
           cargo nextest run --no-run --workspace
 

debian-packaging/CHANGELOG.md

@@ -6,6 +6,7 @@
 
 Released on ReleaseDate.
 
+* Fixed compile error when building without the `http` feature.
 * MSRV 1.70 -> 1.75.
 * `async-std` 1.12 -> 1.13.
 * `async-tar` 0.4 -> 0.5.

debian-packaging/src/error.rs

@@ -12,7 +12,6 @@ pub enum DebianError {
     #[error("file manifest error: {0}")]
     FileManifestError(#[from] FileManifestError),
 
-    #[cfg(feature = "http")]
     #[error("URL error: {0:?}")]
     Url(#[from] url::ParseError),