Revert "Update yi packages" for now (yi-editor/yi#922)

still seems broken with alex-3.2.1

This reverts commit f3d021f8ba.

build-constraints.yaml

@@ -1820,7 +1820,6 @@ packages:
 
     "Dmitry Ivanov <ethercrow@gmail.com> @ethercrow":
         - charsetdetect-ae
-        - compiler-errors
         - docopt
         - dynamic-state
         - dyre
@@ -1829,21 +1828,13 @@ packages:
         - pointedlist
         - word-trie
         - xdg-basedir
-        - yi
+        # - yi BLOCKED due to yi-language
-        - yi-core
+        #- yi-fuzzy-open
-        - yi-frontend-pango
+
-        - yi-frontend-vty
+        # https://github.com/yi-editor/yi/issues/922
-        - yi-fuzzy-open
+        # - yi-language
-        - yi-ireader
+
-        - yi-keymap-cua
-        - yi-keymap-emacs
-        - yi-keymap-vim
-        - yi-language
-        - yi-misc-modes
-        - yi-mode-haskell
-        - yi-mode-javascript
         - yi-rope
-        - yi-snippet
 
     "Tobias Bexelius <tobias_bexelius@hotmail.com> @tobbebex":
         - GPipe