As discussed in the SharePoint: Hide View All Site Content and Recycle Bin Post. The same instructions can be adapted to hide other unwanted SharePoint content.

Below is a selection of CSS code that can be used to “rebrand” SharePoint using a Content Editor Web Part:

<style>
/* breadcrumbs */
.ms-titlearea {
  display: none;
}
/* Tabs */
.ms-banner {
 display: none;
}
/* Title Bar */
.ms-pagetitle {
  display: none;
}
/* Search function */
.ms-searchform {
display: none
}
/* Welcome and help stuff */
.ms-globallinks {
 display: none
}
/* Remove shadings from right */
.ms-sitetitle {
     background-color: white
}
</style>

Module 1: SharePoint Development for .Net Developers

Module 2: Web Parts

Module 3: Page Navigation

Module 4: Page Branding

Module 5: Data List

Module 6: Web Services

Module 7: Event Handlers

Module 8: Content Types and Site Columns

Module 9: Workflow

Module 10: User Management

Module 11: Silverlight

Module 12: Deployment