Remove unused functions

app/src/App/API.purs

@@ -1224,15 +1224,6 @@ type AdjustManifest =
   , resolutions :: Maybe (Map PackageName Version)
   }
 
--- other TODOs:
---   - make sure that we're handling 'verified resolutions' appropriately
---   - if we changed the manifest then don't trust our initial compile,
---     do it over again with the new resolutions (maybe just always redo
---     it for simplicity's sake? like findAllCompilers just tries them all?)
---   - delete the validation 'unused dependencies' check since we have
---     this whole dedicated function?
---   - test this function (a bitch, i know)
-
 -- | Check the given manifest to determine dependencies that are unused and can
 -- | be removed, as well as dependencies that are used but not listed in the
 -- | manifest dependencies.

lib/src/Operation/Validation.purs

@@ -94,23 +94,6 @@ getUnresolvedDependencies (Manifest { dependencies }) resolutions =
         | not (Range.includes dependencyRange version) -> Just $ Right $ dependencyName /\ dependencyRange /\ version
         | otherwise -> Nothing
 
--- | Discovers dependencies listed in the manifest that are not actually used
--- | by the solved dependencies. This should not produce an error, but it
--- | indicates an over-constrained manifest.
-getUnusedDependencies :: Manifest -> Map PackageName Version -> Set PackageName -> Maybe (NonEmptySet PackageName)
-getUnusedDependencies (Manifest { dependencies }) resolutions discovered = do
-  let
-    -- There may be too many resolved dependencies because the manifest includes
-    -- e.g. test dependencies, so we start by only considering resolved deps
-    -- that are actually used.
-    inUse = Set.filter (flip Set.member discovered) (Map.keys resolutions)
-
-    -- Next, we can determine which dependencies are unused by looking at the
-    -- difference between the manifest dependencies and the resolved packages
-    unused = Set.filter (not <<< flip Set.member inUse) (Map.keys dependencies)
-
-  NonEmptySet.fromSet unused
-
 data TarballSizeResult
   = ExceedsMaximum Number
   | WarnPackageSize Number