[Android Themes] z31s1g:
For what it's worth, comment out the following lines in the xml:

Stock theme, ui.xml: 294-335

Stock theme, portrait_hdpi, portrait.xml: 4492-4574, 4797-4847, 4880-4930

Materialised 303X_v1, black theme, ui.xml: 586-677

Materialised 303X_v1, black theme, black.xml: 3247-3338, 10682-10773, 12017-12152, 12637-12728

Looking at the xml you should see the following element pattern: a fill (the background) followed by a lot of buttons.

If you recognize this pattern, you can find the concerned parts in the xml files for the other theme versions as well.

Sample from the black.xml:

<fill color="%accent%">
<condition var1="navbar_accent" var2="1"/>
<placement x="0" y="%row_nav_y%" w="%screen_w%" h="%nav_h%"/>
</fill>

<button>
<condition var1="tw_busy" var2="0"/>
<condition var1="navbar_accent" var2="0"/>
<placement x="%center_x%" y="%row_navbtn_y%" placement="4"/>
<image resource="home" highlightresource="home_hl"/>
<action function="key">home</action>
</button>

<button>
<condition var1="tw_busy" var2="0"/>
<condition var1="navbar_accent" var2="1"/>
<placement x="%center_x%" y="%row_navbtn_y%" placement="4"/>
<image resource="home_white" highlightresource="home_white_hl"/>
<action function="key">home</action>
</button>

<button>
<condition var1="tw_busy" var2="0"/>
<condition var1="navbar_sams" var2="0"/>
<condition var1="navbar_accent" var2="0"/>
<placement x="%back_button_x%" y="%row_navbtn_y%" placement="4"/>
<image resource="back" highlightresource="back_hl"/>
<action function="key">back</action>
</button>

<button>
<condition var1="tw_busy" var2="0"/>
<condition var1="navbar_sams" var2="0"/>
<condition var1="navbar_accent" var2="1"/>
<placement x="%back_button_x%" y="%row_navbtn_y%" placement="4"/>
<image resource="back_white" highlightresource="back_white_hl"/>
<action function="key">back</action>
</button>

<button>
<condition var1="tw_busy" var2="0"/>
<condition var1="navbar_sams" var2="1"/>
<condition var1="navbar_accent" var2="0"/>
<placement x="%slideout_button_x%" y="%row_navbtn_y%" placement="4"/>
<image resource="back" highlightresource="back_hl"/>
<action function="key">back</action>
</button>

<button>
<condition var1="tw_busy" var2="0"/>
<condition var1="navbar_sams" var2="1"/>
<condition var1="navbar_accent" var2="1"/>
<placement x="%slideout_button_x%" y="%row_navbtn_y%" placement="4"/>
<image resource="back_white" highlightresource="back_white_hl"/>
<action function="key">back</action>
</button>

<button>
<condition var1="tw_busy" var2="0"/>
<condition var1="navbar_sams" var2="0"/>
<condition var1="navbar_accent" var2="0"/>
<placement x="%slideout_button_x%" y="%row_navbtn_y%" placement="4"/>
<image resource="slideout" highlightresource="slideout_hl"/>
<action function="overlay">console</action>
</button>

<button>
<condition var1="tw_busy" var2="0"/>
<condition var1="navbar_sams" var2="0"/>
<condition var1="navbar_accent" var2="1"/>
<placement x="%slideout_button_x%" y="%row_navbtn_y%" placement="4"/>
<image resource="slideout_white" highlightresource="slideout_white_hl"/>
<action function="overlay">console</action>
</button>

<button>
<condition var1="tw_busy" var2="0"/>
<condition var1="navbar_sams" var2="1"/>
<condition var1="navbar_accent" var2="0"/>
<placement x="%back_button_x%" y="%row_navbtn_y%" placement="4"/>
<image resource="slideout" highlightresource="slideout_hl"/>
<action function="overlay">console</action>
</button>

<button>
<condition var1="tw_busy" var2="0"/>
<condition var1="navbar_sams" var2="1"/>
<condition var1="navbar_accent" var2="1"/>
<placement x="%back_button_x%" y="%row_navbtn_y%" placement="4"/>
<image resource="slideout_white" highlightresource="slideout_white_hl"/>
<action function="overlay">console</action>
</button>