MQE-1256: "Merge" works different for tests and action groups

- Removed duplicated ActionGroup in file, causes a validation error on upcoming MFTF 2.3.7

Author: KevinBKozan

app/code/Magento/PageBuilder/Test/Mftf/ActionGroup/BackgroundConfigurationActionGroup.xml

@@ -8,25 +8,6 @@
 
 <actionGroups xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
         xsi:noNamespaceSchemaLocation="urn:magento:mftf:Test/etc/actionGroupSchema.xsd">
-    <actionGroup name="validateBackgroundAttributes">
-        <arguments>
-            <argument name="section"/>
-            <argument name="backgroundColor"/>
-            <argument name="backgroundImage"/>
-            <argument name="backgroundPosition" defaultValue="PageBuilderBackgroundPosition_Default"/>
-            <argument name="backgroundSize" defaultValue="PageBuilderBackgroundSize_Default"/>
-            <argument name="backgroundRepeat" defaultValue="PageBuilderBackgroundRepeat_Default"/>
-            <argument name="backgroundAttachment" defaultValue="PageBuilderBackgroundAttachment_Default"/>
-            <argument name="index" defaultValue="1" type="string"/>
-        </arguments>
-        <waitForElementVisible selector="{{section.base(index)}}" stepKey="waitForBaseElement"/>
-        <waitForElementVisible selector="{{section.backgroundColor(index, backgroundColor.rgb)}}" stepKey="waitForBackgroundColor"/>
-        <waitForElementVisible selector="{{section.backgroundImage(index, backgroundImage.fileName)}}" stepKey="waitForBackgroundImage"/>
-        <waitForElementVisible selector="{{section.backgroundPosition(index, backgroundPosition.styleValue)}}" stepKey="waitForBackgroundPosition"/>
-        <waitForElementVisible selector="{{section.backgroundSize(index, backgroundSize.value)}}" stepKey="waitForBackgroundSize"/>
-        <waitForElementVisible selector="{{section.backgroundRepeat(index, backgroundRepeat.styleValue)}}" stepKey="waitForBackgroundRepeat"/>
-        <waitForElementVisible selector="{{section.backgroundAttachment(index, backgroundAttachment.value)}}" stepKey="waitForBackgroundAttachment"/>
-    </actionGroup>
     <actionGroup name="validateBackgroundAttributesWithNoImageOrColor">
         <arguments>
             <argument name="section"/>