Modified default github issue template

.github/ISSUE_TEMPLATE/bug_report.md

@@ -20,16 +20,10 @@ A clear and concise description of what you expected to happen.
 **Screenshots**
 If applicable, add screenshots to help explain your problem.
 
-**Desktop (please complete the following information):**
- - OS: [e.g. iOS]
- - 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]
+**Environment (please complete the following information):**
+ - OS: [e.g. macOS 10.X, Windows 8, ...]
+ - Version: [e.g. 0.X]
+ - Additional information:
 
 **Additional context**
 Add any other context about the problem here.