Update issue templates

.github/ISSUE_TEMPLATE/bug_report.md

@@ -28,11 +28,6 @@ If applicable, add screenshots to help explain your problem.
  - Browser [e.g. chrome, safari]
  - Version [e.g. 22]
 
-**Smartphone (please complete the following information):**
- - Device: [e.g. iPhone6]
- - OS: [e.g. iOS8.1]
- - Browser [e.g. stock browser, safari]
- - Version [e.g. 22]
-
 **Additional context**
+ - Environment [e.g. flutter doctor -v or rustup show]
 Add any other context about the problem here.