binman: Read the fit entries only once

At present the entries are read twice, once by the entry_Section class
and once by the FIT implementation. This is harmless but can be confusing
when debugging. Fix it.

Signed-off-by: Simon Glass <sjg@chromium.org>
Reviewed-by: Alper Nebi Yasak <alpernebiyasak@gmail.com>

tools/binman/etype/fit.py

@@ -185,7 +185,6 @@ class Entry_fit(Entry_section):
         self.mkimage = None
 
     def ReadNode(self):
-        self.ReadEntries()
         super().ReadNode()
 
     def _get_operation(self, subnode):