remove COPYING files

Most of them were the GPL.

It is useless to have a copy of the license in every
sub-directory.

From now on, there is only the LICENSE in the top
directory of the distribution.

	deleted:    common/utils/COPYING
	deleted:    common/utils/hashtable/COPYING
	deleted:    common/utils/itti/COPYING
	deleted:    common/utils/itti_analyzer/COPYING
	deleted:    common/utils/itti_analyzer/common/COPYING
	deleted:    common/utils/itti_analyzer/libbuffers/COPYING
	deleted:    common/utils/itti_analyzer/libparser/COPYING
	deleted:    common/utils/itti_analyzer/libresolver/COPYING
	deleted:    common/utils/itti_analyzer/libui/COPYING
	deleted:    openair1/COPYING
	deleted:    openair1/PHY/CODING/COPYING
	deleted:    openair1/PHY/CODING/TESTBENCH/COPYING
	deleted:    openair1/PHY/COPYING
	deleted:    openair1/PHY/INIT/COPYING
	deleted:    openair1/PHY/LTE_ESTIMATION/COPYING
	deleted:    openair1/PHY/LTE_REFSIG/COPYING
	deleted:    openair1/PHY/LTE_TRANSPORT/COPYING
	deleted:    openair1/PHY/MODULATION/COPYING
	deleted:    openair1/PHY/TOOLS/COPYING
	deleted:    openair1/SCHED/COPYING
	deleted:    openair1/SIMULATION/COPYING
	deleted:    openair1/SIMULATION/ETH_TRANSPORT/COPYING
	deleted:    openair1/SIMULATION/LTE_PHY/COPYING
	deleted:    openair1/SIMULATION/RF/COPYING
	deleted:    openair1/SIMULATION/TOOLS/COPYING
	deleted:    openair2/COMMON/COPYING
	deleted:    openair2/DOCS/TEMPLATES/CODE/COPYING
	deleted:    openair2/LAYER2/COPYING
	deleted:    openair2/LAYER2/MAC/COPYING
	deleted:    openair2/LAYER2/PDCP_v10.1.0/COPYING
	deleted:    openair2/LAYER2/RLC/AM_v9.3.0/COPYING
	deleted:    openair2/LAYER2/RLC/COPYING
	deleted:    openair2/LAYER2/RLC/TM_v9.3.0/COPYING
	deleted:    openair2/LAYER2/RLC/UM_v9.3.0/COPYING
	deleted:    openair2/NETWORK_DRIVER/LITE/COPYING
	deleted:    openair2/NETWORK_DRIVER/MESH/COPYING
	deleted:    openair2/NETWORK_DRIVER/UE_IP/COPYING
	deleted:    openair2/PHY_INTERFACE/COPYING
	deleted:    openair2/RRC/L2_INTERFACE/COPYING
	deleted:    openair2/RRC/LITE/COPYING
	deleted:    openair2/RRC/LITE/MESSAGES/COPYING
	deleted:    openair2/RRC/NAS/COPYING
	deleted:    openair2/RRM_4_RRC_LITE/COPYING
	deleted:    openair2/RRM_4_RRC_LITE/src/COPYING
	deleted:    openair2/RRM_4_RRC_LITE/src/radio_resources/COPYING
	deleted:    openair2/UTIL/BIGPHYS/COPYING
	deleted:    openair2/UTIL/CLI/COPYING
	deleted:    openair2/UTIL/FIFO/COPYING
	deleted:    openair2/UTIL/LISTS/COPYING
	deleted:    openair2/UTIL/LOG/COPYING
	deleted:    openair2/UTIL/MATH/COPYING
	deleted:    openair2/UTIL/MEM/COPYING
	deleted:    openair2/UTIL/OCG/COPYING
	deleted:    openair2/UTIL/OMG/COPYING
	deleted:    openair2/UTIL/OMV/COPYING
	deleted:    openair2/UTIL/OPT/COPYING
	deleted:    openair2/UTIL/OSA/COPYING
	deleted:    openair2/UTIL/OSD/COPYING
	deleted:    openair2/UTIL/OTG/COPYING
	deleted:    openair2/UTIL/SCTP/COPYING
	deleted:    openair2/UTIL/TIMER/COPYING
	deleted:    openair2/UTIL/TRACE/COPYING
	deleted:    openair2/X2AP/COPYING
	deleted:    openair3/COPYING
	deleted:    openair3/DOCS/COPYING
	deleted:    openair3/DOCS/DOXYGEN/COPYING
	deleted:    openair3/DOCS/Latex/COPYING
	deleted:    openair3/DOCS/Latex/DefaultBearer/COPYING
	deleted:    openair3/DOCS/Latex/EPC/COPYING
	deleted:    openair3/NAS/COMMON/API/NETWORK/COPYING
	deleted:    openair3/NAS/COMMON/COPYING
	deleted:    openair3/NAS/COMMON/EMM/MSG/COPYING
	deleted:    openair3/NAS/COMMON/ESM/MSG/COPYING
	deleted:    openair3/NAS/COMMON/IES/COPYING
	deleted:    openair3/NAS/COMMON/UTIL/COPYING
	deleted:    openair3/NAS/COPYING
	deleted:    openair3/NAS/TEST/AS_SIMULATOR/COPYING
	deleted:    openair3/NAS/TEST/COPYING
	deleted:    openair3/NAS/TEST/MSC/COPYING
	deleted:    openair3/NAS/TEST/NETWORK/COPYING
	deleted:    openair3/NAS/TEST/USER/COPYING
	deleted:    openair3/NAS/TOOLS/COPYING
	deleted:    openair3/NAS/UE/API/USER/COPYING
	deleted:    openair3/NAS/UE/API/USIM/COPYING
	deleted:    openair3/NAS/UE/EMM/SAP/COPYING
	deleted:    openair3/NAS/UE/ESM/SAP/COPYING
	deleted:    openair3/S1AP/COPYING
	deleted:    openair3/S1AP/MESSAGES/ASN1/COPYING
	deleted:    openair3/S1AP/MESSAGES/ASN1/R10.5/COPYING
	deleted:    openair3/S1AP/MESSAGES/ASN1/R8.10/COPYING
	deleted:    openair3/S1AP/MESSAGES/ASN1/R9.8/COPYING
	deleted:    openair3/S1AP/MESSAGES/COPYING
	deleted:    openair3/SCTP/COPYING
	deleted:    openair3/SECU/COPYING
	deleted:    openair3/TEST/COPYING
	deleted:    openair3/UTILS/COPYING
	deleted:    targets/ARCH/COMMON/COPYING
	deleted:    targets/ARCH/ETHERNET/USERSPACE/LIB/COPYING
	deleted:    targets/ARCH/EXMIMO/DEFS/COPYING
	deleted:    targets/ARCH/EXMIMO/DRIVER/eurecom/COPYING
	deleted:    targets/ARCH/EXMIMO/DRIVER/exmimo3/COPYING
	deleted:    targets/ARCH/EXMIMO/DRIVER/telecomparistech/COPYING
	deleted:    targets/ARCH/EXMIMO/USERSPACE/LIB/COPYING
	deleted:    targets/ARCH/EXMIMO/USERSPACE/OAI_FW_INIT/COPYING
	deleted:    targets/ARCH/EXMIMO/USERSPACE/OCTAVE/COPYING
	deleted:    targets/ARCH/USRP/USERSPACE/LIB/COPYING
	deleted:    targets/COMMON/COPYING
	deleted:    targets/COPYING
	deleted:    targets/PROJECTS/CENTOS-LTE-EPC-INTEGRATION/COPYING
	deleted:    targets/PROJECTS/COPYING
	deleted:    targets/PROJECTS/GENERIC-LTE-EPC/COPYING
	deleted:    targets/RT/USER/COPYING
	deleted:    targets/SIMU/PROC/COPYING
	deleted:    targets/SIMU/USER/COPYING