Revert nettle version pinning as it doesn't work well in side-tag

This reverts commit 7fecd39c3d. As there
is a circular dependency between gnutls and gnupg2, that commit added
some fragility to the build process.

Related: #2097327
Signed-off-by: Daiki Ueno <dueno@redhat.com>

gnutls.spec

@@ -13,7 +13,7 @@ print(string.sub(hash, 0, 16))
 }
 
 Version: 3.7.6
-Release: 9%{?dist}
+Release: 10%{?dist}
 # not upstreamed
 Patch: gnutls-3.6.7-no-now-guile.patch
 Patch: gnutls-3.2.7-rpath.patch
@@ -100,10 +100,6 @@ Source100:	gmp-6.2.1.tar.xz
 # Taken from the main gmp package
 Source101:	gmp-6.2.1-intel-cet.patch
 
-%if %{with fips}
-Requires: nettle%{?_isa} = 3.8-2
-%endif
-
 # Wildcard bundling exception https://fedorahosted.org/fpc/ticket/174
 Provides: bundled(gnulib) = 20130424
 
@@ -394,6 +390,9 @@ make check %{?_smp_mflags} GNUTLS_SYSTEM_PRIORITY_FILE=/dev/null
 %endif
 
 %changelog
+* Thu Aug 25 2022 Daiki Ueno <dueno@redhat.com> - 3.7.6-10
+- Revert nettle version pinning as it doesn't work well in side-tag
+
 * Thu Aug 25 2022 Daiki Ueno <dueno@redhat.com> - 3.7.6-9
 - Pin nettle version in Requires when compiled with FIPS