Improve CodeClimate config

- Show all offences
- Use shared rubocop.yml
- Remove customizations

.codeclimate.yml

@@ -1,12 +1,12 @@
+version: "2"
+prepare:
+  fetch:
+    - "https://raw.githubusercontent.com/internetee/style-guide/master/ruby/.rubocop.yml"
 plugins:
   brakeman:
     enabled: true
   bundler-audit:
     enabled: true
-  csslint:
-    enabled: true
-  coffeelint:
-    enabled: true
   duplication:
     enabled: true
     config:
@@ -17,22 +17,12 @@ plugins:
     enabled: true
   fixme:
     enabled: true
-    config:
-      strings:
-      - FIXME
-      - TODO
-      - HACK
   rubocop:
     enabled: true
-    channel: rubocop-0-51
-  reek:
-    enabled: true
-    checks:
-      IrresponsibleModule:
-        enabled: false
 exclude_patterns:
-- "config/"
-- "db/"
-- "vendor/"
-- "spec/"
-- "test/"
+  - "bin/"
+  - "config/"
+  - "db/"
+  - "vendor/"
+  - "test/"
+  - "spec/"