Remove a bunch a blocks with no packages left in the snapshot

build-constraints.yaml

@@ -3489,10 +3489,6 @@ packages:
         - haddock-library
         - http-client-openssl
 
-    "Mark Hopkins <markjohnhopkins@gmail.com> @mjhopkins":
-        []
-        # - alerta # servant-client 0.12
-
     "Steven Vandevelde <icid.asset@gmail.com> @icidasset":
         - shikensu
 
@@ -3504,15 +3500,6 @@ packages:
         - mltool
         - hmatrix-morpheus
 
-    "Edward Amsden <edwardamsden@gmail.com> @eamsden":
-        []
-        # https://bitbucket.org/fmapE/h2c/issues/1/compilation-failure-since-upgrading-to
-        #- h2c
-        #- bno055-haskell
-
-    "Lars Brünjes <brunjlar@gmail.com> @brunjlar":
-        - pell < 0 # GHC 8.4 via arithmoi
-
     "Matt Noonan <matt.noonan@gmail.com> @matt-noonan":
         - justified-containers
         - roles >= 0.2
@@ -3686,9 +3673,6 @@ packages:
         - airship < 0 # GHC 8.4 via http-media
         - hedgehog-corpus
 
-    "Sam Stites <sam@stites.io> @stites":
-        - gym-http-api < 0 # via servant servant-client
-
     "Tom Sydney Kerckhove <syd.kerckhove@gmail.com> @NorfairKing":
         - cursor
         - cursor-brick