Remove SCSS unit tests

The behavior tested by them is redundantly tested in the integration
tests. In addition, the behavior inside format.rs is redundant and will
eventually be removed.

src/format.rs

@@ -53,73 +53,3 @@ impl<W: Write> PrettyPrinter<W> {
         Ok(())
     }
 }
-
-#[cfg(test)]
-mod test_scss {
-    use super::StyleSheet;
-    macro_rules! test {
-        ($func:ident, $input:literal) => {
-            #[test]
-            fn $func() {
-                assert_eq!(
-                    String::from($input),
-                    StyleSheet::new($input.to_string())
-                        .expect(concat!("failed to parse on ", $input))
-                        .to_string()
-                );
-            }
-        };
-        ($func:ident, $input:literal, $output:literal) => {
-            #[test]
-            fn $func() {
-                assert_eq!(
-                    String::from($output),
-                    StyleSheet::new($input.to_string())
-                        .expect(concat!("failed to parse on ", $input))
-                        .to_string()
-                );
-            }
-        };
-    }
-
-    test!(empty, "");
-    test!(basic_nesting, "a {\n  b {\n  }\n}\n");
-    test!(mul_nesting, "a, b {\n  a, b {\n  }\n}\n");
-    test!(basic_style, "a {\n  color: red;\n}\n");
-    test!(two_styles, "a {\n  color: red;\n  color: blue;\n}\n");
-    test!(
-        nested_style_in_parent,
-        "a {\n  color: red;\n  b {\n  }\n}\n"
-    );
-    test!(
-        nested_style_in_child,
-        "a {\n  b {\n    color: red;\n  }\n}\n"
-    );
-    test!(
-        nested_style_in_both,
-        "a {\n  color: red;\n  b {\n    color: red;\n  }\n}\n"
-    );
-    test!(
-        deeply_nested_selector,
-        "\
-a {
-  b {
-    c {
-      d {
-        e {
-          f {
-            g {
-              h {
-                i {
-                }
-              }
-            }
-          }
-        }
-      }
-    }
-  }
-}
-"
-    );
-}