Do not build-require unused Test::FailWarnings

It's used only if the top source directory contains a .git directory.
That's not our case. And it looks more like an author's test.

perl-DBD-SQLite.spec

@@ -65,7 +65,7 @@ BuildRequires:  perl(if)
 BuildRequires:  perl(lib)
 # POSIX not used
 BuildRequires:  perl(Test::More)
-BuildRequires:  perl(Test::FailWarnings) >= 0.008
+# Test::FailWarnings not used
 # Win32 not used
 %if %{with perl_DBD_SQLite_enables_optional_test}
 # Optional tests
@@ -117,6 +117,7 @@ make test
 %changelog
 * Tue Sep 08 2020 Petr Pisar <ppisar@redhat.com> - 1.66-2
 - Update DBD-SQLite-1.60-Unbundle-Test-NoWarnings.patch
+- Do not build-require unused Test::FailWarnings
 
 * Mon Aug 31 2020 Jitka Plesnikova <jplesnik@redhat.com> - 1.66-1
 - 1.66 bump