removing submodule

depends/rpi-rgb-led-matrix/bindings/python/rgbmatrix/Makefile

@@ -0,0 +1,15 @@
+# The *.cpp files are included in the distribution; this is only needed when
+# working on the pyx files.
+#
+# Please check in modified *.cpp files with distribution to not require cython
+# to be installed on the users' machine.
+# for python3: make PYTHON=$(which python3) CYTHON=$(which cython3)
+CYTHON ?= cython
+
+all : core.cpp graphics.cpp
+
+%.cpp : %.pyx
+	$(CYTHON) --cplus -o $@ $^
+
+clean:
+	rm -rf core.cpp graphics.cpp