Enable document-features feature as the required dependency is now packaged

[skip changelog]

gix-date-fix-metadata.diff

@@ -1,13 +0,0 @@
---- gix-date-0.8.0/Cargo.toml	1970-01-01T00:00:01+00:00
-+++ gix-date-0.8.0/Cargo.toml	2023-09-13T19:28:14.900421+00:00
-@@ -40,10 +40,6 @@
- features = ["std"]
- default-features = false
- 
--[dependencies.document-features]
--version = "0.2.0"
--optional = true
--
- [dependencies.itoa]
- version = "1.0.1"
- 

rust-gix-date.spec

@@ -12,9 +12,6 @@ Summary:        Parse dates the way git does
 License:        MIT OR Apache-2.0
 URL:            https://crates.io/crates/gix-date
 Source:         %{crates_source}
-# Manually created patch for downstream crate metadata changes
-# * Disable feature that is only required for building documentation
-Patch:          gix-date-fix-metadata.diff
 
 BuildRequires:  cargo-rpm-macros >= 24
 
@@ -50,6 +47,18 @@ use the "default" feature of the "%{crate}" crate.
 %files       -n %{name}+default-devel
 %ghost %{crate_instdir}/Cargo.toml
 
+%package     -n %{name}+document-features-devel
+Summary:        %{summary}
+BuildArch:      noarch
+
+%description -n %{name}+document-features-devel %{_description}
+
+This package contains library source intended for building other packages which
+use the "document-features" feature of the "%{crate}" crate.
+
+%files       -n %{name}+document-features-devel
+%ghost %{crate_instdir}/Cargo.toml
+
 %package     -n %{name}+serde-devel
 Summary:        %{summary}
 BuildArch:      noarch