Update .ameba.yml

.ameba.yml

@@ -1,8 +1,17 @@
 # This configuration file was generated by `ameba --gen-config`
-# on 2020-06-04 03:48:05 UTC using Ameba version 0.10.1.
+# on 2020-06-05 04:58:55 UTC using Ameba version 0.10.1.
 # The point is for the user to remove these configuration records
 # one by one as the reported problems are removed from the code base.
 
+# Problems found: 3
+# Run `ameba --only Lint/UselessAssign` for details
+Lint/UselessAssign:
+  Description: Disallows useless variable assignments
+  Enabled: true
+  Severity: Warning
+  Excluded:
+  - examples/stage_bot.cr
+
 # Problems found: 4
 # Run `ameba --only Metrics/CyclomaticComplexity` for details
 Metrics/CyclomaticComplexity: