remove useless test, update disallowed_method description

Author: Frank

clippy_lints/src/disallowed_method.rs

@@ -18,12 +18,12 @@ declare_clippy_lint! {
     ///
     /// ```rust,ignore
     /// // example code where clippy issues a warning
-    /// foo.bad_method(); // Foo is disallowed
+    /// foo.bad_method(); // Foo::bad_method is disallowed in the configuration
     /// ```
     /// Use instead:
     /// ```rust,ignore
     /// // example code which does not raise clippy warning
-    /// goodStruct.bad_method(); // not disallowed
+    /// goodStruct.bad_method(); // GoodStruct::bad_method is not disallowed
     /// ```
     pub DISALLOWED_METHOD,
     nursery,

clippy_lints/src/utils/conf.rs

@@ -165,7 +165,7 @@ define_Conf! {
     /// Lint: WILDCARD_IMPORTS. Whether to allow certain wildcard imports (prelude, super in tests).
     (warn_on_all_wildcard_imports, "warn_on_all_wildcard_imports": bool, false),
     /// Lint: DISALLOWED_METHOD. The list of blacklisted methods to lint about. NB: `bar` is not here since it has legitimate uses
-    (disallowed_methods, "disallowed_methods": Vec<String>, ["disallowed_method::Foo::bad_method", "disallowed_method::Baz::bad_method", "disallowed_method::Quux::bad_method"].iter().map(ToString::to_string).collect()),
+    (disallowed_methods, "disallowed_methods": Vec<String>, Vec::<String>::new()),
 }
 
 impl Default for Conf {