cleanup cmake files, remove libusb module

CMakeLists.txt

@@ -111,7 +111,6 @@ find_package(GnuradioCore)
 find_package(GnuradioAudio)
 find_package(GnuradioUHD)
 find_package(GnuradioFCD)
-#find_package(LibUSB)
 find_package(LibRTLSDR)
 
 if(NOT GRUEL_FOUND)
@@ -122,14 +121,6 @@ if(NOT GNURADIO_CORE_FOUND)
     message(FATAL_ERROR "GnuRadio Core required to compile osmosdr")
 endif()
 
-if(NOT GNURADIO_AUDIO_FOUND)
-    message(FATAL_ERROR "GnuRadio Audio required to compile osmosdr")
-endif()
-
-#if(NOT LIBUSB_FOUND)
-#    message(FATAL_ERROR "LibUSB 1.0 required to compile osmosdr")
-#endif()
-
 ########################################################################
 # Setup the include and linker paths
 ########################################################################
@@ -139,14 +130,12 @@ include_directories(
     ${Boost_INCLUDE_DIRS}
     ${GRUEL_INCLUDE_DIRS}
     ${GNURADIO_CORE_INCLUDE_DIRS}
-#    ${LIBUSB_INCLUDE_DIR}
 )
 
 link_directories(
     ${Boost_LIBRARY_DIRS}
     ${GRUEL_LIBRARY_DIRS}
     ${GNURADIO_CORE_LIBRARY_DIRS}
-#    ${LIBUSB_LIBRARY_DIRS}
 )
 
 # Set component parameters

cmake/Modules/FindLibUSB.cmake

@@ -1,28 +0,0 @@
-if(NOT LIBUSB_FOUND)
-  pkg_check_modules (LIBUSB_PKG libusb-1.0)
-  find_path(LIBUSB_INCLUDE_DIR NAMES libusb.h
-    PATHS
-    ${LIBUSB_PKG_INCLUDE_DIRS}
-    /usr/include/libusb-1.0
-    /usr/include
-    /usr/local/include
-  )
-
-  find_library(LIBUSB_LIBRARIES NAMES usb-1.0
-    PATHS
-    ${LIBUSB_PKG_LIBRARY_DIRS}
-    /usr/lib
-    /usr/local/lib
-  )
-
-if(LIBUSB_INCLUDE_DIR AND LIBUSB_LIBRARIES)
-  set(LIBUSB_FOUND TRUE CACHE INTERNAL "libusb-1.0 found")
-  message(STATUS "Found libusb-1.0: ${LIBUSB_INCLUDE_DIR}, ${LIBUSB_LIBRARIES}")
-else(LIBUSB_INCLUDE_DIR AND LIBUSB_LIBRARIES)
-  set(LIBUSB_FOUND FALSE CACHE INTERNAL "libusb-1.0 found")
-  message(STATUS "libusb-1.0 not found.")
-endif(LIBUSB_INCLUDE_DIR AND LIBUSB_LIBRARIES)
-
-mark_as_advanced(LIBUSB_INCLUDE_DIR LIBUSB_LIBRARIES)
-
-endif(NOT LIBUSB_FOUND)