Clean PHPStan baselines

tests/phpstan/configs/check-explicit-mixed-baseline.neon

@@ -80,21 +80,6 @@ parameters:
 			count: 1
 			path: ../../../src/permission/PermissionParser.php
 
-		-
-			message: "#^Parameter \\#1 \\$description of method pocketmine\\\\command\\\\Command\\:\\:setDescription\\(\\) expects pocketmine\\\\lang\\\\Translatable\\|string, mixed given\\.$#"
-			count: 1
-			path: ../../../src/plugin/PluginBase.php
-
-		-
-			message: "#^Parameter \\#1 \\$permissionMessage of method pocketmine\\\\command\\\\Command\\:\\:setPermissionMessage\\(\\) expects string, mixed given\\.$#"
-			count: 1
-			path: ../../../src/plugin/PluginBase.php
-
-		-
-			message: "#^Parameter \\#1 \\$usage of method pocketmine\\\\command\\\\Command\\:\\:setUsage\\(\\) expects pocketmine\\\\lang\\\\Translatable\\|string, mixed given\\.$#"
-			count: 1
-			path: ../../../src/plugin/PluginBase.php
-
 		-
 			message: "#^Argument of an invalid type mixed supplied for foreach, only iterables are supported\\.$#"
 			count: 1

tests/phpstan/configs/l7-baseline.neon

@@ -35,11 +35,6 @@ parameters:
 			count: 1
 			path: ../../../src/PocketMine.php
 
-		-
-			message: "#^Parameter \\#1 \\$path of function realpath expects string, array\\<int, mixed\\>\\|string\\|false given\\.$#"
-			count: 1
-			path: ../../../src/PocketMine.php
-
 		-
 			message: "#^Parameter \\#1 \\$path of function realpath expects string, string\\|false given\\.$#"
 			count: 2

tests/phpstan/configs/runtime-type-checks.neon

@@ -10,8 +10,3 @@ parameters:
 			count: 1
 			path: ../../../src/network/mcpe/handler/InGamePacketHandler.php
 
-		-
-			message: "#^Call to function is_array\\(\\) with array\\<string, mixed\\> will always evaluate to true\\.$#"
-			count: 1
-			path: ../../../src/plugin/PluginBase.php
-