Drop unusupported rubyforge_project gemspec attr

Author: olleolleolle

gem-maven-plugin/src/main/java/de/saumya/mojo/gem/PackageMojo.java

@@ -58,9 +58,6 @@ public class PackageMojo extends AbstractGemMojo {
     @Parameter
     private String                    requirePaths;
 
-    @Parameter
-    private String                    rubyforgeProject;
-
     @Parameter
     private String                    rubygemsVersion;
 
@@ -240,7 +237,6 @@ private void buildFromPom(final MavenProject project, final GemArtifact artifact
         gemSpecWriter.append("bindir", this.bindir);
         gemSpecWriter.append("post_install_message", this.postInstallMessage);
 
-        gemSpecWriter.append("rubyforge_project", this.rubyforgeProject);
         gemSpecWriter.appendRdocFiles(this.extraRdocFiles);
         gemSpecWriter.appendFiles(this.extraFiles);
         gemSpecWriter.appendList("executables", this.executables);

ruby-tools/src/main/java/de/saumya/mojo/gems/spec/GemSpecification.java

@@ -55,8 +55,6 @@ public class GemSpecification {
 
     private List<String>   requirements;
 
-    private String         rubyforge_project;
-
     private String         rubygems_version;
 
     private String         specification_version;
@@ -305,14 +303,6 @@ public void setRequirements(final List<String> requirements) {
         this.requirements = requirements;
     }
 
-    public String getRubyforge_project() {
-        return this.rubyforge_project;
-    }
-
-    public void setRubyforge_project(final String rubyforgeProject) {
-        this.rubyforge_project = rubyforgeProject;
-    }
-
     public String getRubygems_version() {
         return this.rubygems_version;
     }