reenable HTF et al (skogsbaer/HTF#66)

build-constraints.yaml

@@ -3589,16 +3589,6 @@ packages:
         - yi-mode-javascript < 0 # GHC 8.4 via yi-rope
         - yi-snippet < 0 # GHC 8.4 via yi-rope
 
-        # https://github.com/skogsbaer/HTF/issues/66
-        - HTF < 0
-        - HPDF < 0
-        - buffer-builder < 0
-        - datadog < 0
-        - dataurl < 0
-        - graph-core < 0
-        - ignore < 0
-        - large-hashable < 0
-
     # This section was used to programmatically generate a set of removals
     # that would result in a valid build plan.
     # These packages have version bounds in their deps or transitive deps