Few quick fixes to make IDE happy

framework/base/Component.php

@@ -568,7 +568,7 @@ class Component extends BaseObject
             }
             if ($removed) {
                 $this->_events[$name] = array_values($this->_events[$name]);
-                return $removed;
+                return true;
             }
         }
 

framework/base/Event.php

@@ -158,7 +158,7 @@ class Event extends BaseObject
             }
             if ($removed) {
                 self::$_events[$name][$class] = array_values(self::$_events[$name][$class]);
-                return $removed;
+                return true;
             }
         }
 

framework/base/Module.php

@@ -425,7 +425,7 @@ class Module extends ServiceLocator
                 Yii::debug("Loading module: $id", __METHOD__);
                 /* @var $module Module */
                 $module = Yii::createObject($this->_modules[$id], [$id, $this]);
-                $module->setInstance($module);
+                $module::setInstance($module);
                 return $this->_modules[$id] = $module;
             }
         }