Update items for environment on bug-report

Author: atoato88

.github/ISSUE_TEMPLATE/bug-report.md

@@ -15,9 +15,7 @@ labels: kind/bug
 
 **Environment**:
 - Kubernetes version (use `kubectl version`):
-- Cloud provider or hardware configuration:
 - OS (e.g: `cat /etc/os-release`):
 - Kernel (e.g. `uname -a`):
-- Install tools:
-- Network plugin and version (if this is a network-related bug):
+- Go version (e.g. `go version`):
 - Others: