[refactor](plugin) Remove FE cloud auto-download for JDBC drivers and Java UDF

fe/fe-core/src/main/java/org/apache/doris/catalog/JdbcResource.java

@@ -23,8 +23,6 @@
 import org.apache.doris.common.DdlException;
 import org.apache.doris.common.EnvUtils;
 import org.apache.doris.common.FeConstants;
-import org.apache.doris.common.plugin.CloudPluginDownloader;
-import org.apache.doris.common.plugin.CloudPluginDownloader.PluginType;
 import org.apache.doris.common.proc.BaseProcResult;
 import org.apache.doris.common.util.TimeUtils;
 import org.apache.doris.common.util.Util;
@@ -449,18 +447,6 @@ private static String checkAndReturnDefaultDriverUrl(String driverUrl) {
             } else if (oldTargetFile.exists()) {
                 // File exists in old default directory
                 return "file://" + oldTargetPath;
-            } else if (Config.isCloudMode()) {
-                // Cloud mode: download from cloud to default directory
-                try {
-                    String downloadedPath = CloudPluginDownloader.downloadFromCloud(
-                            PluginType.JDBC_DRIVERS, driverUrl, targetPath);
-                    return "file://" + downloadedPath;
-                } catch (Exception e) {
-                    LOG.warn("failed to download jdbc driver url: " + driverUrl, e);
-                    throw new RuntimeException("Cannot download JDBC driver from cloud: " + driverUrl
-                            + ". Please retry later or check your driver has been uploaded to cloud. Error: "
-                            + Util.getRootCauseMessage(e));
-                }
             } else {
                 // File does not exist in both new and old default directory
                 throw new RuntimeException("JDBC driver file does not exist: " + driverUrl);

fe/fe-core/src/main/java/org/apache/doris/nereids/trees/plans/commands/CreateFunctionCommand.java

@@ -46,7 +46,6 @@
 import org.apache.doris.common.ErrorCode;
 import org.apache.doris.common.ErrorReport;
 import org.apache.doris.common.FeConstants;
-import org.apache.doris.common.plugin.CloudPluginDownloader;
 import org.apache.doris.common.util.URI;
 import org.apache.doris.common.util.Util;
 import org.apache.doris.mysql.privilege.PrivPredicate;
@@ -485,21 +484,6 @@ private String getRealUrl(String url) {
 
     private String checkAndReturnDefaultJavaUdfUrl(String url) {
         String defaultUrl = EnvUtils.getDorisHome() + "/plugins/java_udf";
-        // In cloud mode, try cloud download first
-        if (Config.isCloudMode()) {
-            String targetPath = defaultUrl + "/" + url;
-            try {
-                String downloadedPath = CloudPluginDownloader.downloadFromCloud(
-                        CloudPluginDownloader.PluginType.JAVA_UDF, url, targetPath);
-                if (!downloadedPath.isEmpty()) {
-                    return "file://" + downloadedPath;
-                }
-            } catch (Exception e) {
-                throw new RuntimeException("Cannot download UDF from cloud: " + url
-                        + ". Please retry later or check your UDF has been uploaded to cloud.");
-            }
-        }
-        // Return the file path (original UDF behavior)
         return "file://" + defaultUrl + "/" + url;
     }