component/bt : delete the un-used lines

components/bt/component.mk

@@ -30,8 +30,6 @@ COMPONENT_ADD_INCLUDEDIRS :=	bluedroid/bta/include			\
 				bluedroid/include			\
 				include	
 
-CFLAGS +=
-
 LIBS := btdm_app
 
 COMPONENT_ADD_LDFLAGS := -lbt -L $(COMPONENT_PATH)/lib \
@@ -70,8 +68,6 @@ COMPONENT_SRCDIRS := 	bluedroid/bta/dm			\
 			bluedroid				\
 			.
 
-#include $(IDF_PATH)/make/component_common.mk
-
 ALL_LIB_FILES := $(patsubst %,$(COMPONENT_PATH)/lib/lib%.a,$(LIBS))
 $(COMPONENT_LIBRARY): $(ALL_LIB_FILES)