Delete core_problem.md

.github/ISSUE_TEMPLATE/core_problem.md

@@ -1,28 +0,0 @@
----
-name: Core Development Issue
-about: Something that doesn't directly relate to the platform
----
-
-## Enviroment
-
-> development enviroment info.
-
-- dioxus version:
-- dioxus feature: ["web", "desktop", ..."]
-- rust version:
-
-## Error Info
-
-> verbose error information.
-
-```
-
-```
-
-## Bad Code
-
-> the code where error occurred.
-
-```rust
-
-```