Revert "Fix RSA encryption bit size to 2048"

This reverts commit c2dc063.

Author: HannesWell

team/bundles/org.eclipse.jsch.ui/src/org/eclipse/jsch/internal/ui/preference/PreferencePage.java

@@ -497,11 +497,7 @@ else if(e.widget==keyGenerateRSA){
 					final JSchException[] _e=new JSchException[1];
 					BusyIndicator.showWhile(getShell().getDisplay(), () -> {
 						try {
-							if (__type == KeyPair.RSA) {
-								_kpair[0] = KeyPair.genKeyPair(getJSch(), __type, 2048);
-							} else {
-								_kpair[0] = KeyPair.genKeyPair(getJSch(), __type);
-							}
+							_kpair[0] = KeyPair.genKeyPair(getJSch(), __type);
 						} catch (JSchException e1) {
 							_e[0] = e1;
 						}
@@ -512,11 +508,7 @@ else if(e.widget==keyGenerateRSA){
 					kpair=_kpair[0];
 
 					ByteArrayOutputStream out=new ByteArrayOutputStream();
-					if (__type == KeyPair.RSA) {
-						kpairComment = _type + "-2048"; //$NON-NLS-1$
-					} else {
-						kpairComment = _type + "-1024"; //$NON-NLS-1$
-					}
+					kpairComment=_type+"-1024"; //$NON-NLS-1$
 					kpair.writePublicKey(out, kpairComment);
 					out.close();
 					publicKeyText.setText(out.toString());