qt: better looking trayicon

Github-Pull: #4678
Rebased-By: Wladimir J. van der Laan <laanwj@gmail.com>

src/Makefile.qt.include

@@ -245,8 +245,6 @@ RES_ICONS = \
   qt/res/icons/remove.png \
   qt/res/icons/send.png \
   qt/res/icons/synced.png \
-  qt/res/icons/toolbar.png \
-  qt/res/icons/toolbar_testnet.png \
   qt/res/icons/transaction0.png \
   qt/res/icons/transaction2.png \
   qt/res/icons/transaction_conflicted.png \