remove needless raw string hashes (clippy::needless_raw_string_hashes)

Author: daniel.eades

graphql_client_codegen/src/constants.rs

@@ -1,13 +1,13 @@
 pub(crate) const TYPENAME_FIELD: &str = "__typename";
 
-pub(crate) const MULTIPLE_SUBSCRIPTION_FIELDS_ERROR: &str = r##"
+pub(crate) const MULTIPLE_SUBSCRIPTION_FIELDS_ERROR: &str = r"
 Multiple-field queries on the root subscription field are forbidden by the spec.
 
 See: https://github.com/facebook/graphql/blob/master/spec/Section%205%20--%20Validation.md#subscription-operation-definitions
-"##;
+";
 
 /// Error message when a selection set is the root of a query.
-pub(crate) const SELECTION_SET_AT_ROOT: &str = r#"
+pub(crate) const SELECTION_SET_AT_ROOT: &str = r"
 Operations in queries must be named.
 
 Instead of this:
@@ -33,4 +33,4 @@ query UserRepositories {
     }
   }
 }
-"#;
+";