Fixes as per review comments

src/main/java/org/gitlab4j/api/AbstractApi.java

@@ -370,7 +370,7 @@ public abstract class AbstractApi implements Constants {
      * @param expectedStatus the HTTP status that should be returned from the server
      * @param name the name for the form field that contains the file name
      * @param fileToUpload a File instance pointing to the file to upload
-     * @param mediaType the content-type of the uploaded file, if null will be determined from fileToUpload
+     * @param mediaType unused; will be removed in the next major version
      * @param pathArgs variable list of arguments used to build the URI
      * @return a ClientResponse instance with the data returned from the endpoint
      * @throws GitLabApiException if any exception occurs during execution
@@ -398,7 +398,7 @@ public abstract class AbstractApi implements Constants {
      * @param expectedStatus the HTTP status that should be returned from the server
      * @param name the name for the form field that contains the file name
      * @param fileToUpload a File instance pointing to the file to upload
-     * @param mediaType the content-type of the uploaded file, if null will be determined from fileToUpload
+     * @param mediaType unused; will be removed in the next major version
      * @param url the fully formed path to the GitLab API endpoint
      * @return a ClientResponse instance with the data returned from the endpoint
      * @throws GitLabApiException if any exception occurs during execution
@@ -418,7 +418,7 @@ public abstract class AbstractApi implements Constants {
      * @param expectedStatus the HTTP status that should be returned from the server
      * @param name the name for the form field that contains the file name
      * @param fileToUpload a File instance pointing to the file to upload
-     * @param mediaType the content-type of the uploaded file, if null will be determined from fileToUpload
+     * @param mediaType unused; will be removed in the next major version
      * @param formData the Form containing the name/value pairs
      * @param url the fully formed path to the GitLab API endpoint
      * @return a ClientResponse instance with the data returned from the endpoint

src/main/java/org/gitlab4j/api/GitLabApiClient.java

@@ -561,7 +561,7 @@ public class GitLabApiClient implements AutoCloseable {
      *
      * @param name the name for the form field that contains the file name
      * @param fileToUpload a File instance pointing to the file to upload
-     * @param mediaTypeString the content-type of the uploaded file, if null will be determined from fileToUpload
+     * @param mediaTypeString unused; will be removed in the next major version
      * @param pathArgs variable list of arguments used to build the URI
      * @return a ClientResponse instance with the data returned from the endpoint
      * @throws IOException if an error occurs while constructing the URL
@@ -576,7 +576,7 @@ public class GitLabApiClient implements AutoCloseable {
      *
      * @param name the name for the form field that contains the file name
      * @param fileToUpload a File instance pointing to the file to upload
-     * @param mediaTypeString the content-type of the uploaded file, if null will be determined from fileToUpload
+     * @param mediaTypeString unused; will be removed in the next major version
      * @param formData the Form containing the name/value pairs
      * @param pathArgs variable list of arguments used to build the URI
      * @return a ClientResponse instance with the data returned from the endpoint
@@ -593,17 +593,14 @@ public class GitLabApiClient implements AutoCloseable {
      *
      * @param name the name for the form field that contains the file name
      * @param fileToUpload a File instance pointing to the file to upload
-     * @param mediaTypeString the content-type of the uploaded file, if null will be determined from fileToUpload
+     * @param mediaTypeString unused; will be removed in the next major version
      * @param formData the Form containing the name/value pairs
      * @param url the fully formed path to the GitLab API endpoint
      * @return a ClientResponse instance with the data returned from the endpoint
      * @throws IOException if an error occurs while constructing the URL
      */
     protected Response upload(String name, File fileToUpload, String mediaTypeString, Form formData, URL url) throws IOException {
-        MediaType mediaType = (mediaTypeString != null ? MediaType.valueOf(mediaTypeString) : null);
-        FileDataBodyPart filePart = mediaType != null ?
-            new FileDataBodyPart(name, fileToUpload, mediaType) :
-            new FileDataBodyPart(name, fileToUpload);
+        FileDataBodyPart filePart = new FileDataBodyPart(name, fileToUpload);
         return upload(filePart, formData, url);
     }
 
@@ -613,10 +610,7 @@ public class GitLabApiClient implements AutoCloseable {
     }
 
     protected Response upload(String name, InputStream inputStream, String filename, String mediaTypeString, Form formData, URL url) throws IOException {
-        MediaType mediaType = (mediaTypeString != null ? MediaType.valueOf(mediaTypeString) : null);
-        StreamDataBodyPart streamDataBodyPart = mediaType != null ?
-            new StreamDataBodyPart(name, inputStream, filename, mediaType) :
-            new StreamDataBodyPart(name, inputStream, filename);
+        StreamDataBodyPart streamDataBodyPart = new StreamDataBodyPart(name, inputStream, filename);
         return upload(streamDataBodyPart, formData, url);
     }
 

src/main/java/org/gitlab4j/api/ProjectApi.java

@@ -2552,7 +2552,7 @@ public class ProjectApi extends AbstractApi implements Constants {
      *
      * @param projectIdOrPath the project in the form of an Integer(ID), String(path), or Project instance, required
      * @param fileToUpload the File instance of the file to upload, required
-     * @param mediaType the media type of the file to upload, optional
+     * @param mediaType unused; will be removed in the next major version
      * @return a FileUpload instance with information on the just uploaded file
      * @throws GitLabApiException if any exception occurs
      */
@@ -2569,7 +2569,6 @@ public class ProjectApi extends AbstractApi implements Constants {
      *
      * @param projectIdOrPath the project in the form of an Integer(ID), String(path), or Project instance, required
      * @param inputStream the data to upload, required
-     * @param mediaType the media type of the file to upload, required
      * @return a FileUpload instance with information on the just uploaded file
      * @throws GitLabApiException if any exception occurs
      */