simplify gitlab.

git-open

@@ -43,11 +43,11 @@ else
 fi
 
 # URL normalization
-# Github support
+# Github 
 if grep -q github <<<$giturl; then
     giturl=${giturl/git\@github\.com\:/https://github.com/}
     providerUrlDifference=tree
-# bitbucket support
+# bitbucket 
 elif grep -q bitbucket <<<$giturl; then
     giturl=${giturl/git\@bitbucket\.org\:/https://bitbucket.org/}
     providerUrlDifference=branch
@@ -64,18 +64,17 @@ giturl=${giturl%\.git}
     branch="?at=refs%2Fheads%2F${branch}"
   fi
 else
+  # custom gitlab
   gitlab_domain=$(git config --get gitopen.gitlab.domain)
   if [ ! -z "$gitlab_domain" ]; then
     if grep -q $gitlab_domain <<<$giturl; then
       giturl=${giturl/git\@${gitlab_domain}:/https://${gitlab_domain}/}
-
-      gitlab_urldifference=$(git config --get gitopen.gitlab.urldifference)
-      if [ -z "$gitlab_urldifference" ]; then
-        providerUrlDifference=tree
-      else
-        providerUrlDifference=$gitlab_urldifference
-      fi
+      providerUrlDifference=tree
     fi
+  # hosted gitlab
+  elif grep -q gitlab <<<$giturl; then
+    giturl=${giturl/git\@gitlab\.com\:/https://gitlab.com/}
+    providerUrlDifference=tree
   fi
 fi
 giturl=${giturl%\.git}