remove unused tests

spec/lib/rex/time_spec.rb

@@ -44,26 +44,4 @@ RSpec.describe Rex::ExtTime do
       end
     end
   end
-
-  describe ".str_to_sec" do
-    it "returns seconds from encoded string" do
-      conversions.each do |k, v|
-        expect(subject.str_to_sec(v)).to eq(k)
-      end
-    end
-
-    context "when invalid encoded string" do
-      let(:invalid) { 'invalid' }
-      it "returns 0" do
-        expect(subject.str_to_sec(invalid)).to eq(0)
-      end
-    end
-
-    context "when incorrect pluralization" do
-      let(:invalid) { '1 years 1 days 2 hour 1 min 1 secs' }
-      it "returns correct number of seconds" do
-        expect(subject.str_to_sec(invalid)).to eq(31629661)
-      end
-    end
-  end
 end