remove extra catch block

Author: keshavdandeva

java-bigquery-jdbc/src/main/java/com/google/cloud/bigquery/jdbc/BigQueryConnection.java

@@ -1336,9 +1336,6 @@ public synchronized List<String> getDiscoveredProjects() throws SQLException {
         projects.add(project.getProjectId());
       }
       this.discoveredProjectsCache = ImmutableList.copyOf(projects);
-    } catch (BigQueryException e) {
-      throw new BigQueryJdbcException(
-          "Failed to list all accessible projects due to BigQuery error.", e);
     } catch (Exception e) {
       throw new BigQueryJdbcException("Failed to list all accessible projects.", e);
     }

java-bigquery-jdbc/src/test/java/com/google/cloud/bigquery/jdbc/BigQueryConnectionTest.java

@@ -570,9 +570,7 @@ public void testGetDiscoveredProjects_BigQueryExceptionThrown() throws Exception
               () -> {
                 connection.getDiscoveredProjects();
               });
-      assertTrue(
-          ex.getMessage()
-              .contains("Failed to list all accessible projects due to BigQuery error."));
+      assertTrue(ex.getMessage().contains("Failed to list all accessible projects."));
       assertEquals(exception, ex.getCause());
 
       // Subsequent call should retry since no cache is set