reduce linux output format

gengjiawen · gengjiawen · commit 97a06bbcf882 · 2019-08-10T08:11:45.000+08:00
diff --git a/electron-builder.json b/electron-builder.json
@@ -12,9 +12,7 @@
       "target": [
         "AppImage",
         "snap",
-        "deb",
-        "rpm",
-        "apk"
+        "deb"
       ]
     }
 }
