chore: Remove unnecessary access modifiers on interface methods.

src/main/java/com/sendgrid/APICallback.java

@@ -9,11 +9,11 @@ public interface APICallback {
      * Callback method in case of an error.
      * @param ex the error that was thrown.
      */
-    public void error(Exception ex);
+    void error(Exception ex);
 
     /**
      * Callback method in case of a valid response.
      * @param response the valid response.
      */
-    public void response(Response response);
+    void response(Response response);
 }

src/main/java/com/sendgrid/SendGridAPI.java

@@ -10,34 +10,34 @@ public interface SendGridAPI {
    * 
    * @param apiKey is your Twilio SendGrid API Key: https://app.sendgrid.com/settings/api_keys
    */
-  public void initializeSendGrid(String apiKey);
+  void initializeSendGrid(String apiKey);
 
   /**
    * Returns the library version
    * 
    * @return the library version.
    */
-  public String getLibraryVersion();
+  String getLibraryVersion();
 
   /**
    * Gets the version.
    *
    * @return returns the version.
    */
-  public String getVersion();
+  String getVersion();
 
   /**
    * Sets the version.
    * 
    * @param version the Twilio SendGrid version.
    */
-  public void setVersion(String version);
+  void setVersion(String version);
 
   /**
    * Gets the request headers.
    * @return returns a map of request headers.
    */
-  public Map<String, String> getRequestHeaders();
+  Map<String, String> getRequestHeaders();
 
   /**
    * Adds a request headers.
@@ -46,29 +46,29 @@ public interface SendGridAPI {
    * @param value the value
    * @return returns a map of request headers.
    */
-  public Map<String, String> addRequestHeader(String key, String value);
+  Map<String, String> addRequestHeader(String key, String value);
 
   /**
    * Removes a request headers.
    * 
    * @param key the key
    * @return returns a map of request headers.
    */
-  public Map<String, String> removeRequestHeader(String key);
+  Map<String, String> removeRequestHeader(String key);
 
   /**
    * Gets the host.
    * 
    * @return returns the host.
    */
-  public String getHost();
+  String getHost();
 
   /**
    * Sets the host.
    * 
    * @param host the host to set
    */
-  public void setHost(String host);
+  void setHost(String host);
 
   /**
    * Class makeCall makes the call to the Twilio SendGrid API, override this method for
@@ -78,7 +78,7 @@ public interface SendGridAPI {
    * @return returns a response.
    * @throws IOException in case of network or marshal error.
    */
-  public Response makeCall(Request request) throws IOException;
+  Response makeCall(Request request) throws IOException;
 
   /**
    * Class api sets up the request to the Twilio SendGrid API, this is main interface.
@@ -87,5 +87,5 @@ public interface SendGridAPI {
    * @return returns a response.
    * @throws IOException in case of network or marshal error.
    */
-  public Response api(Request request) throws IOException;
+  Response api(Request request) throws IOException;
 }