RIIR update lints: Generate deprecated lints

The update script now also generates the 'register_removed' section in
`clippy_lints/src/lib.rs`.

Also, instead of using `let mut store ...`, I added a new identifier
line so that the replacement will continue to work in case `let mut
store ...` ever changes.

clippy_dev/src/main.rs

@@ -82,4 +82,12 @@ fn update_lints() {
         false,
         || { gen_changelog_lint_list(lint_list.clone()) }
     );
+
+    replace_region_in_file(
+        "../clippy_lints/src/lib.rs",
+        "begin deprecated lints",
+        "end deprecated lints",
+        false,
+        || { gen_deprecated(lint_list.clone()) }
+    );
 }