User documentation: Linux installation screenshots replaced by SCT-specific ones

plugins/org.yakindu.sct.doc.user/help/02_installation/installation.textile

@@ -159,8 +159,6 @@ In the example below, we chose the _/my/workspace_ directory as our workspace. W
 
 Click on the _OK_ button to proceed.
 
-</p><div style="background: yellow"><p>
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 On the first start, YAKINDU Statechart Tools presents a _Welcome_ window:
 
 !images/linux_install_050_eclipse_welcome.png(YAKINDU Statechart Tools presenting the "Welcome" window)!
@@ -169,8 +167,6 @@ You can browse the material shown here, if you want. When you are done, please c
 
 !images/linux_install_060_eclipse_workbench.png(The YAKINDU Statechart Tools workbench)!
 
-</p></div><p>
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 This is your working environment now. Congratulations, you have just started YAKINDU Statechart Tools!
 
 You can "proceed":../03_getting_started/getting_started.html now to create your first YAKINDU Statecharts Tools project.