drop const_fn and nightly feautres

Signed-off-by: Igor Gnatenko <ignatenkobrain@fedoraproject.org>

rust-uuid.spec

@@ -75,18 +75,6 @@ which use "byteorder" feature of "%{crate}" crate.
 %files       -n %{name}+byteorder-devel
 %ghost %{cargo_registry}/%{crate}-%{version}/Cargo.toml
 
-%package     -n %{name}+const_fn-devel
-Summary:        %{summary}
-BuildArch:      noarch
-
-%description -n %{name}+const_fn-devel %{_description}
-
-This package contains library source intended for building other packages
-which use "const_fn" feature of "%{crate}" crate.
-
-%files       -n %{name}+const_fn-devel
-%ghost %{cargo_registry}/%{crate}-%{version}/Cargo.toml
-
 %package     -n %{name}+md5-devel
 Summary:        %{summary}
 BuildArch:      noarch
@@ -99,18 +87,6 @@ which use "md5" feature of "%{crate}" crate.
 %files       -n %{name}+md5-devel
 %ghost %{cargo_registry}/%{crate}-%{version}/Cargo.toml
 
-%package     -n %{name}+nightly-devel
-Summary:        %{summary}
-BuildArch:      noarch
-
-%description -n %{name}+nightly-devel %{_description}
-
-This package contains library source intended for building other packages
-which use "nightly" feature of "%{crate}" crate.
-
-%files       -n %{name}+nightly-devel
-%ghost %{cargo_registry}/%{crate}-%{version}/Cargo.toml
-
 %package     -n %{name}+rand-devel
 Summary:        %{summary}
 BuildArch:      noarch