targets/*.conf cleanup: remove unnecessary TPUDRV_blob= lines MAIN_blob= and/or TPUDRV_blob= may be *optionally* defined in targets/*.conf files; if either variable is defined, it means that using the specified version of the blob library is allowed on this target, albeit likely suboptimal; if the variable is not defined, then using a blob is not an option and compilation from source is required for this component. MAIN_blob= and TPUDRV_blob= are now defaulted to empty in configure.sh, thus there is no need to explicitly specify that using a blob is not a valid option.

#ifndef __L1SW_CFG__
#define __L1SW_CFG__
#define AMR 1
#define CUST 0
#define DCO_ALGO 0
#define IDS 0
#define L1_12NEIGH 1
#define L1_EOTD 0
#define L1_EOTD_QBIT_ACC 0
#define L1_GPRS 0
#define L1_GTT 0
#define L1_MIDI 0
#define L1_VOICE_MEMO_AMR 1
#define MELODY_E2 1
#define OP_L1_STANDALONE 0
#define OP_RIV_AUDIO 1
#define ORDER2_TX_TEMP_CAL 1
#define RAZ_VULSWITCH_REGAUDIO 0
#define SECURITY 0
#define SPEECH_RECO 1
#define TESTMODE 1
#define TRACE_TYPE 4
#define VCXO_ALGO 1
#endif /* __L1SW_CFG__ */