Remove old school icons

src/pulsatingscience.qrc

 <RCC>
     <qresource prefix="/icons">
-        <file>resources/control-quit.png</file>
-        <file>resources/help-about.png</file>
-        <file>resources/help-help.png</file>
-        <file>resources/help-website.png</file>
         <file>resources/aei-icon48.png</file>
     </qresource>
     <qresource prefix="/textures">

src/pulsatingscience.ui

@@ -476,10 +476,6 @@
    <addaction name="menuHelp"/>
   </widget>
   <action name="actionAbout">
-   <property name="icon">
-    <iconset resource="pulsatingscience.qrc">
-     <normaloff>:/icons/resources/help-about.png</normaloff>:/icons/resources/help-about.png</iconset>
-   </property>
    <property name="text">
     <string>About</string>
    </property>
@@ -494,10 +490,6 @@
    </property>
   </action>
   <action name="actionQuit">
-   <property name="icon">
-    <iconset resource="pulsatingscience.qrc">
-     <normaloff>:/icons/resources/control-quit.png</normaloff>:/icons/resources/control-quit.png</iconset>
-   </property>
    <property name="text">
     <string>Quit</string>
    </property>