project: simplify Feature Request template

https://git.minetest.land/Mineclonia/Mineclonia/pulls/56#issuecomment-22682

.gitea/issue_template/feature-request.md

@@ -3,8 +3,7 @@
 name: "Feature Request"
 about: "Mineclonia doesn't do something you need it to"
 labels:
- - "missing feature"
- - unconfirmed
+ - "feature request"
 
 ---
 
@@ -12,27 +11,6 @@ labels:
 
 <!-- Describe what's wrong. -->
 
-## Example workflow
+## Solution
 
-<!--
-Write down an example of what you'd like to happen.
-If you need more steps, just keep adding numbers. If you
-don't need them all, delete the empty numbers.
--->
-1. 
-2. 
-3. 
-
-## Environment
-
-**Mineclonia Version**: <!-- Paste the version of Mineclonia here, if you know it. -->
-
-<!--
-Please refer to https://git.minetest.land/Mineclonia/Mineclonia/wiki/Reporting-Bugs if
-you need help with the following fields.
--->
-**Minetest Version**:
-**Operating System**:
-**CPU Type**:
-**RAM**:
-**Graphics Card**:
+<!-- Write down an example of what you'd like to happen. -->