adb: Remove unused flags

BUILD_ADBD is always true

ANDROID_GADGET is not used in the code anymore. adbd now checks at
runtime if /dev/android_adb is present

Change-Id: If6c3278606c79cc74d1ef5978e7b8e3a4513aef8
diff --git a/adb/Android.mk b/adb/Android.mk
index 248208a..1a25106 100644
--- a/adb/Android.mk
+++ b/adb/Android.mk
@@ -95,16 +95,6 @@
 # adbd device daemon
 # =========================================================
 
-BUILD_ADBD := true
-
-# build adbd for the Linux simulator build
-# so we can use it to test the adb USB gadget driver on x86
-#ifeq ($(HOST_OS),linux)
-#    BUILD_ADBD := true
-#endif
-
-
-ifeq ($(BUILD_ADBD),true)
 include $(CLEAR_VARS)
 
 LOCAL_SRC_FILES := \
@@ -127,12 +117,6 @@
 LOCAL_CFLAGS := -O2 -g -DADB_HOST=0 -Wall -Wno-unused-parameter
 LOCAL_CFLAGS += -D_XOPEN_SOURCE -D_GNU_SOURCE
 
-# TODO: This should probably be board specific, whether or not the kernel has
-# the gadget driver; rather than relying on the architecture type.
-ifeq ($(TARGET_ARCH),arm)
-LOCAL_CFLAGS += -DANDROID_GADGET=1
-endif
-
 ifneq (,$(filter userdebug eng,$(TARGET_BUILD_VARIANT)))
 LOCAL_CFLAGS += -DALLOW_ADBD_ROOT=1
 endif
@@ -146,8 +130,6 @@
 LOCAL_STATIC_LIBRARIES := libcutils libc
 include $(BUILD_EXECUTABLE)
 
-endif
-
 
 # adb host tool for device-as-host
 # =========================================================