Remove irrelevant types, use keep aliases

src/Psalm/Type/Atomic.php

@@ -45,7 +45,6 @@
 use Psalm\Type\Atomic\TLowercaseString;
 use Psalm\Type\Atomic\TMixed;
 use Psalm\Type\Atomic\TNamedObject;
-use Psalm\Type\Atomic\TNegativeInt;
 use Psalm\Type\Atomic\TNever;
 use Psalm\Type\Atomic\TNonEmptyArray;
 use Psalm\Type\Atomic\TNonEmptyList;
@@ -55,8 +54,6 @@
 use Psalm\Type\Atomic\TNonEmptyScalar;
 use Psalm\Type\Atomic\TNonEmptyString;
 use Psalm\Type\Atomic\TNonFalsyString;
-use Psalm\Type\Atomic\TNonNegativeInt;
-use Psalm\Type\Atomic\TNonPositiveInt;
 use Psalm\Type\Atomic\TNonspecificLiteralInt;
 use Psalm\Type\Atomic\TNonspecificLiteralString;
 use Psalm\Type\Atomic\TNull;
@@ -234,13 +231,13 @@ public static function create(
                 return new TPositiveInt();
 
             case 'non-positive-int':
-                return new TNonPositiveInt();
+                return new TIntRange(null, -1);
 
             case 'negative-int':
-                return new TNegativeInt();
+                return new TIntRange(null, -1);
 
             case 'non-negative-int':
-                return new TNonNegativeInt();
+                return new TPositiveInt();
 
             case 'numeric':
                 return $php_version !== null ? new TNamedObject($value) : new TNumeric();
@@ -732,18 +729,6 @@ public function isTruthy(): bool
             return true;
         }
 
-        if ($this instanceof TNonPositiveInt) {
-            return true;
-        }
-
-        if ($this instanceof TNegativeInt) {
-            return true;
-        }
-
-        if ($this instanceof TNonNegativeInt) {
-            return true;
-        }
-
         if ($this instanceof TLiteralClassString) {
             return true;
         }