Unset BROWSER variable to avoid gh/yarn conflict

script/ghci

@@ -5,6 +5,7 @@
 set -e
 
 export GH_NO_UPDATE_NOTIFIER=1
+unset BROWSER
 
 # GitHub CLI returns non-zero error code if checks are not complete:
 ghoutput=$(gh pr checks || true)

script/ghco

@@ -4,6 +4,7 @@
 set -e
 
 export GH_NO_UPDATE_NOTIFIER=1
+unset BROWSER
 
 if [ "$1" = '-a' ]; then
   cmd='gh pr list --limit 100' 

script/ghpr

@@ -3,6 +3,7 @@
 # Open or create a GitHub PR in the browser
 
 export GH_NO_UPDATE_NOTIFIER=1
+unset BROWSER
 
 currentbranch="$(git bn)"
 if [ "$currentbranch" = "staging" ] || [ "$currentbranch" = "master" ]; then