Revert "Half implement querying based on relative and non-relative paths"

This reverts commit af05d823fe. I will pick up work on this later.

client/client_test.go

@@ -1142,6 +1142,4 @@ func testHelpCommand(t *testing.T, tester shellTester) {
 	}
 }
 
-// TODO: test for relative CWD and for non-relative CWD
-
 // TODO: write a test that runs hishtroy export | grep -v pipefail and then see if that shows up in query/export, I think there is weird behavior here