chore: Remove unused haskell dependencies

Resolves #3873

postgrest.cabal

@@ -108,7 +108,6 @@ library
                     , either                    >= 4.4.1 && < 5.1
                     , extra                     >= 1.7.0 && < 2.0
                     , fuzzyset                  >= 0.2.4 && < 0.3
-                    , gitrev                    >= 1.2 && < 1.4
                     , hasql                     >= 1.6.1.1 && < 1.7
                     , hasql-dynamic-statements  >= 0.3.1 && < 0.4
                     , hasql-notifications       >= 0.2.2.0 && < 0.3
@@ -127,6 +126,7 @@ library
                     , network-uri               >= 2.6.1 && < 2.8
                     , optparse-applicative      >= 0.13 && < 0.19
                     , parsec                    >= 3.1.11 && < 3.2
+                    -- Technically unused, can be removed after updating to hasql >= 1.7
                     , postgresql-libpq          >= 0.10
                     , prometheus-client         >= 1.1.1 && < 1.2.0
                     , protolude                 >= 0.3.1 && < 0.4
@@ -255,7 +255,6 @@ test-suite spec
                     , aeson             >= 2.0.3 && < 2.3
                     , aeson-qq          >= 0.8.1 && < 0.9
                     , async             >= 2.1.1 && < 2.3
-                    , auto-update       >= 0.1.4 && < 0.2
                     , base64-bytestring >= 1 && < 1.3
                     , bytestring        >= 0.10.8 && < 0.13
                     , case-insensitive  >= 1.2 && < 1.3