Remove: Protocol change issue template as it is now incorporated into the others

.gitlab/issue_templates/protocol_change.md

@@ -1,37 +0,0 @@
-## Protocol / API Change
-
-### Summary
-<!-- Brief description of the protocol change -->
-
-### Affected Commands / Responses
-<!-- Which commands or response types are being added, changed, or removed? -->
-
-| Command | Response | Type of Change | Description |
-|---------|----------|----------------|-------------|
-|         |          | New / Changed / Removed | |
-
-### New / Changed Syntax
-```
-<!-- Before / after or new command syntax here -->
-<!-- Example:
-BEFORE: LOGIN UNAME=<username> PASS=<password>
-AFTER:  LOGIN USERNAME=<username> PASSWORD=<password>
--->
-```
-
-### Affected Implementation Layers
-<!-- Which components / classes need to be updated? -->
-- [ ] `Session`
-- [ ] `User` or `UserRegistry`
-- [ ] `Tokenizer` / `RequestTokenClassifier`
-- [ ] `ProtocolParser`
-- [ ] `CommandParserDispatcher` + corresponding `CommandParser`
-- [ ] `CommandHandler`
-- [ ] `Response` hierarchy
-- [ ] `GameEngine` or `GameState`
-- [ ] Client-side (create your own issue and create link)
-
-### Motivation
-<!-- Why is this protocol change necessary? -->
-
-/label ~protocol