[NO-JIRA] Fix reported code smells

server/sonar-ce-task-projectanalysis/src/main/java/org/sonar/ce/task/projectanalysis/period/NewCodePeriodResolver.java

@@ -84,7 +84,7 @@ private Period toPeriod(NewCodePeriodType type, @Nullable String value, DbSessio
     }
   }
 
-  private Period resolveByReferenceBranch(String value) {
+  private static Period resolveByReferenceBranch(String value) {
     return newPeriod(NewCodePeriodType.REFERENCE_BRANCH, value, null);
   }
 

server/sonar-db-dao/src/main/java/org/sonar/db/ce/CeTaskCharacteristicDto.java

@@ -19,12 +19,8 @@
  */
 package org.sonar.db.ce;
 
-import java.util.HashSet;
 import java.util.Set;
 
-import static java.util.Arrays.asList;
-import static java.util.Collections.unmodifiableSet;
-
 public class CeTaskCharacteristicDto {
 
   public static final String BRANCH_KEY = "branch";

server/sonar-webserver-webapi/src/main/java/org/sonar/server/monitoring/package-info.java

@@ -0,0 +1,23 @@
+/*
+ * SonarQube
+ * Copyright (C) 2009-2021 SonarSource SA
+ * mailto:info AT sonarsource DOT com
+ *
+ * This program is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU Lesser General Public
+ * License as published by the Free Software Foundation; either
+ * version 3 of the License, or (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+ * Lesser General Public License for more details.
+ *
+ * You should have received a copy of the GNU Lesser General Public License
+ * along with this program; if not, write to the Free Software Foundation,
+ * Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301, USA.
+ */
+@ParametersAreNonnullByDefault
+package org.sonar.server.monitoring;
+
+import javax.annotation.ParametersAreNonnullByDefault;

sonar-plugin-api-impl/src/main/java/org/sonar/api/batch/sensor/internal/SensorContextTester.java

@@ -30,7 +30,6 @@
 import java.util.Map;
 import java.util.Objects;
 import java.util.Set;
-import java.util.stream.Stream;
 import javax.annotation.CheckForNull;
 import javax.annotation.Nullable;
 import org.sonar.api.SonarQubeSide;

sonar-scanner-engine/src/main/java/org/sonar/scanner/sensor/DefaultSensorStorage.java

@@ -75,8 +75,6 @@
 import org.sonar.scanner.scan.branch.BranchConfiguration;
 
 import static java.lang.Math.max;
-import static java.util.Arrays.asList;
-import static java.util.Collections.unmodifiableSet;
 import static java.util.stream.Collectors.toList;
 import static org.sonar.api.measures.CoreMetrics.COMMENT_LINES_DATA_KEY;
 import static org.sonar.api.measures.CoreMetrics.LINES_KEY;