fix: drop unnecessary and to-be-invalid #[doc] attributes

This fixes a build failure under Windows. It seems the two options
will only work at the crate level in the future so the compiler warns
about them now, and will fail build later. In CI, warnings seem to
fail the build already.

rust-lang/rust#82730
https://doc.rust-lang.org/nightly/rustdoc/the-doc-attribute.html#at-the-crate-level

ipc/src/core.rs

@@ -17,11 +17,8 @@
 //! # }
 //! ```
 
-#![doc(html_favicon_url = "https://docs.sequoia-pgp.org/favicon.png")]
-#![doc(html_logo_url = "https://docs.sequoia-pgp.org/logo.svg")]
 #![warn(missing_docs)]
 
-
 use std::io;
 use std::path::{Path, PathBuf};
 
@@ -102,7 +99,7 @@ impl Context {
     /// `.build()` in order to turn it into a Context.
     pub fn configure() -> Config {
         Config(Context {
-            home: PathBuf::from(""),  // Defer computation of default.
+            home: PathBuf::from(""), // Defer computation of default.
             lib: prefix().join("lib").join("sequoia"),
             ipc_policy: IPCPolicy::Robust,
             ephemeral: false,
@@ -183,10 +180,9 @@ impl Config {
             c.cleanup = true;
         } else {
             if home_not_set {
-                c.home =
-                    dirs::home_dir().ok_or_else(||
-                        anyhow::anyhow!("Failed to get users home directory"))?
-                .join(".sequoia");
+                c.home = dirs::home_dir()
+                    .ok_or_else(|| anyhow::anyhow!("Failed to get users home directory"))?
+                    .join(".sequoia");
             }
         }
         Ok(c)
@@ -250,7 +246,6 @@ pub enum Error {
     IoError(#[from] io::Error),
 }
 
-
 /* IPC policy.  */
 
 /// IPC policy for Sequoia.
@@ -315,7 +310,6 @@ impl<'a> From<&'a IPCPolicy> for u8 {
     }
 }
 
-
 // XXX: TryFrom would be nice.
 impl From<u8> for IPCPolicy {
     fn from(policy: u8) -> Self {