GOGS_ACCOUNT_TOKEN env var for upload nightlies

.drone.yml

@@ -117,8 +117,8 @@ steps:
   - name: upload-nightlies
     image: openpriv/flutter-desktop:linux-fstable-3.13.4
     environment:
-      BUILDFILES_KEY:
-        from_secret: buildfiles_key
+      GOGS_ACCOUNT_TOKEN:
+        from_secret: gogs_account_token
     secrets: [gogs_account_token]
     volumes:
       - name: deps
@@ -127,9 +127,6 @@ steps:
         event: push
         status: [ success ]
     commands:
-      - echo $BUILDFILES_KEY > ~/id_rsab64
-      - base64 -d ~/id_rsab64 > ~/id_rsa
-      - chmod 400 ~/id_rsa
       # TODO When we update Flutter Container to 3.19 migrate these calls...
       - apt update
       - apt install -y jq openssh-client ca-certificates curl