(CI) drop python2 support

Author: MatthijsBurgh

scripts/travis/configure-make.sh

@@ -9,13 +9,11 @@ cp Makefile.config.example Makefile.config
 LINE "BLAS := open"
 LINE "WITH_PYTHON_LAYER := 1"
 
-if $WITH_PYTHON3 ; then
-  # TODO(lukeyeager) this path is currently disabled because of test errors like:
-  #   ImportError: dynamic module does not define init function (PyInit__caffe)
-  LINE "PYTHON_LIBRARIES := python3.4m boost_python-py34"
-  LINE "PYTHON_INCLUDE := /usr/include/python3.4 /usr/lib/python3/dist-packages/numpy/core/include"
-  LINE "INCLUDE_DIRS := \$(INCLUDE_DIRS) \$(PYTHON_INCLUDE)"
-fi
+# TODO(lukeyeager) this path is currently disabled because of test errors like:
+#   ImportError: dynamic module does not define init function (PyInit__caffe)
+# LINE "PYTHON_LIBRARIES := python3.8m boost_python-py38"
+# LINE "PYTHON_INCLUDE := /usr/include/python3.8 /usr/lib/python3/dist-packages/numpy/core/include"
+# LINE "INCLUDE_DIRS := \$(INCLUDE_DIRS) \$(PYTHON_INCLUDE)"
 
 if ! $WITH_IO ; then
   LINE "USE_OPENCV := 0"