address review comments

container/errors.go

@@ -10,11 +10,3 @@ func duplicateDefinitionError(typ reflect.Type, duplicateLoc Location, existingL
 	return errors.Errorf("duplicate provision of type %v by %s\n\talready provided by %s",
 		typ, duplicateLoc, existingLoc)
 }
-
-func dependencyCycleError(failingLocation Location, failingType reflect.Type, callStack []Location) error {
-	panic("TODO")
-}
-
-func cantResolveError(typ reflect.Type, resolveStack []resolveFrame) error {
-	panic("TODO")
-}

container/struct_args.go

@@ -6,13 +6,6 @@ import (
 	"github.com/pkg/errors"
 )
 
-// StructArgs is a type which can be embedded in another struct to alert the
-// container that the fields of the struct are dependency inputs/outputs. That
-// is, the container will not look to resolve a value with StructArgs embedded
-// directly, but will instead use the struct's fields to resolve or populate
-// dependencies. Types with embedded StructArgs can be used in both the input
-// and output parameter positions.
-
 // In can be embedded in another struct to inform the container that the
 // fields of the struct should be treated as dependency inputs.
 // This allows a struct to be used to specify dependencies rather than