Refactor APIHandler interface and remove unnecessary code

Author: ShocOne

internal/apihandlers/jamfpro/jamfpro_api_handler.go

@@ -338,7 +338,6 @@ if err != nil {
         zap.Error(err),
     )
 
-	return nil
 }
 
 // GetAcceptHeader constructs and returns a weighted Accept header string for HTTP requests.

internal/httpclient/api_handler.go

@@ -9,7 +9,7 @@ import (
 	"go.uber.org/zap"
 )
 
-// APIHandler is an interface for encoding, decoding, and determining content types for different API implementations.
+// APIHandler is an interface for encoding, decoding, and implenting contexual api functions for different API implementations.
 // It encapsulates behavior for encoding and decoding requests and responses.
 type APIHandler interface {
 	GetBaseDomain() string