Remove the 'type' attribute from Tab's attributes, as it is invalid type.

[TuVanDev]

Purpose of this pull request

This pull request (PR) aims to remove the 'type' attribute from Tab's attributes, as it is invalid type on the "system.xml reference" page

Fixes #105

Affected pages

• https://experienceleague.adobe.com/docs/commerce-operations/configuration-guide/files/config-reference-systemxml.html#tab-attribute-reference

Reference:
vendor/magento/module-config/etc/system_file.xsd

<xs:element name="tab">
    <xs:annotation>
        <xs:documentation>
            Tab resource. Recursive complex type.
        </xs:documentation>
    </xs:annotation>

    <xs:complexType>
        <xs:sequence>
            <xs:element maxOccurs="1" name="label" type="xs:string" />
        </xs:sequence>
        <xs:attributeGroup ref="tabAttributeGroup"/>
    </xs:complexType>
</xs:element>

tabAttributeGroup is declared as the following

<xs:attributeGroup name="tabAttributeGroup">
    <xs:attribute name="id" type="typeId" use="required" />
    <xs:attribute name="translate" type="xs:string" use="optional" />
    <xs:attribute name="sortOrder" type="xs:float" use="optional" />
    <xs:attribute name="class" type="xs:string" use="optional" />
</xs:attributeGroup>

Therefore, we can confirm that the 'type' attribute is invalid attribute.