How to Fix this error

[jone design]

Unused function parameter $context.
47 public function __construct($id_tab = null, $id_lang = null, $id_shop = null, Context $context = null)
Unused variable $validation.
86 foreach ($this->fieldsValidateLang as $field => $validation)
Unused function parameter $copy_post.
98 public function validateController($htmlentities = true, $copy_post = false)
/dependencies/modules/htcustomhtml/htcustomhtml.php

Unused function parameter $name.
153 private function getHookName($id_hook, $name = false)
Unused function parameter $params.
681 public function hookHeader($params)
/dependencies/modules/htthemeoptions/htthemeoptions.php

Visibility must be declared on method "getContent"
112 function getContent()
Visibility must be declared on method "renderWidget"
335 function renderWidget($hookName = null, array $configuration = [])
Unused function parameter $hookName.
354 public function getWidgetVariables($hookName, array $configuration =[])
Unused function parameter $configuration.
354 public function getWidgetVariables($hookName, array $configuration =[])
Unused variable $htskin.
390 $htskin = Configuration::get('htskin');
/dependencies/modules/httestimonials/httestimonials.php

Unused function parameter $hookName.
838 public function getWidgetVariables($hookName = null, array $configuration = [])
Unused function parameter $configuration.
838 public function getWidgetVariables($hookName = null, array $configuration = [])
/dependencies/modules/htproductnextprev/htproductnextprev.php

Unused variable $errors.
78 $errors = array();
Unused function parameter $params.
202 public function hookDisplayProductNextPrev($params)
/dependencies/modules/htmanufacture/htmanufacture.php

Unused function parameter $params.
62 public function hookHeader($params)
Unused function parameter $hookName.
68 public function getWidgetVariables($hookName = null, array $configuration = [])
Unused function parameter $configuration.
68 public function getWidgetVariables($hookName = null, array $configuration = [])
/dependencies/modules/htcategoryfeature/htcategoryfeature.php

Unused function parameter $hookName.
183 public function getWidgetVariables($hookName = null, array $configuration = [])
Unused function parameter $configuration.
183 public function getWidgetVariables($hookName = null, array $configuration = [])
/dependencies/modules/htproductfilter/classes/HtProductFilterClass.php

Unused function parameter $context.
59 public function __construct($id_slide = null, $id_lang = null, $id_shop = null, Context $context = null)
Unused variable $id_shop.
74 $id_shop = Context::getContext()->shop->id;
/dependencies/modules/htproductfilter/htproductfilter.php

Code after "return" statement cannot be executed
88 return false;
Unused variable $id_lang.
128 $id_lang = (int)$this->context->language->id;505 $id_lang = (int)$this->context->language->id;564 $id_lang = $this->context->language->id;582 $id_lang = $this->context->language->id;597 $id_lang = $this->context->language->id;612 $id_lang = $this->context->language->id;628 $id_lang = $this->context->language->id;645 $id_lang = $this->context->language->id;661 $id_lang = $this->context->language->id;677 $id_lang = $this->context->language->id;693 $id_lang = $this->context->language->id;
Unused variable $selected_categories.
244 $selected_categories = array();
Unused variable $slide.
419 $slide = new HtProductFilterClass((int)Tools::getValue('id_htproductfilter'));
Unused variable $languages.
454 $languages = Language::getLanguages(false);
Unused function parameter $params.
503 public function prevHook($hook_name, $params)
Unused variable $nb_row.
514 $nb_row = $block_prod_item['num_row'];
Unused variable $nb_column.
515 $nb_column = $block_prod_item['num_column'];
Unused function parameter $hookName.
924 public function getWidgetVariables($hookName = null, array $configuration = [])
Unused function parameter $configuration.
924 public function getWidgetVariables($hookName = null, array $configuration = [])
/dependencies/modules/htcountdown/htcountdown.php

Unused function parameter $params.
44 public function hookdisplayHeader($params)
Unused variable $month.
81 $month=date("m",$time);
Unused variable $year.
82 $year=date("Y",$time);
Unused variable $date.
83 $date=date("d",$time);
/dependencies/modules/htslideshow/htslideshow.php

Unused function parameter $params.
465 public function hookdisplayHeader($params)
/dependencies/modules/htslideshow/htslidesho.php

Unused function parameter $context.
60 public function __construct($id_slide = null, $id_lang = null, $id_shop = null, Context $context = null)
/dependencies/modules/htmegamenu/htmegamenu.php

Unused variable $id_column.
581 $id_column = Tools::getValue('id_column');
Unused variable $w_boostrap.
788 $w_boostrap = $this->getWidthList();
Unused variable $languages.
867 $languages = Language::getLanguages(false);990 $languages = Language::getLanguages(false);1184 $languages = Language::getLanguages();
Unused variable $p.
1093 $p = new Product($id_prod);
Unused function parameter $hookName.
1175 public function getWidgetVariables($hookName = null, array $configuration = [])
Unused function parameter $configuration.
1175 public function getWidgetVariables($hookName = null, array $configuration = [])
Unused variable $group_cat_result.
1179 $group_cat_result = array();
Unused variable $shop.
1298 $shop = (object)Shop::getShop((int)$category->getShopID());
/dependencies/modules/htmegamenu/classes/HtMegamenuItemClass.php

Unused function parameter $context.
57 public function __construct($id_item = null, $id_lang = null, $id_shop = null, Context $context = null)
Unused variable $error.
121 if ($error = ImageManager::validateUpload($_FILES[$feild]))
/dependencies/modules/htmegamenu/classes/HtMegamenuRowClass.php

Unused function parameter $context.
43 public function __construct($id_row = null, $id_lang = null, $id_shop = null, Context $context = null)
/dependencies/modules/htmegamenu/classes/HtMegamenuColumnClass.php

Unused function parameter $context.
47 public function __construct($id_column = null, $id_lang = null, $id_shop = null, Context $context = null)
/dependencies/modules/htmegamenu/classes/HtMegamenuClass.php

Unused function parameter $context.
62 public function __construct($id_htmegamenu = null, $id_lang = null, $id_shop = null, Context $context = null)
Unused variable $error.
224 if ($error = ImageManager::validateUpload($_FILES[$feild]))