sonic-yang-models: drop libyang1 dependency

Author: bradh352

rules/sonic-yang-models-py3.mk

@@ -1,9 +1,7 @@
 SONIC_YANG_MODELS_PY3 = sonic_yang_models-1.0-py3-none-any.whl
 $(SONIC_YANG_MODELS_PY3)_SRC_PATH = $(SRC_PATH)/sonic-yang-models
 $(SONIC_YANG_MODELS_PY3)_PYTHON_VERSION = 3
-$(SONIC_YANG_MODELS_PY3)_DEBS_DEPENDS = $(LIBYANG) $(LIBYANG_CPP) \
-                                        $(LIBYANG_PY3) \
-                                        $(LIBYANG3) \
+$(SONIC_YANG_MODELS_PY3)_DEBS_DEPENDS = $(LIBYANG3) \
                                         $(LIBYANG3_PY3)
 
 SONIC_PYTHON_WHEELS += $(SONIC_YANG_MODELS_PY3)