[NXP][k32w0] Remove code that generates errors in debug builds for k32w0

Author: mihai-ignat

src/platform/nxp/k32w/common/OTAImageProcessorImpl.cpp

@@ -407,7 +407,6 @@ CHIP_ERROR OTAImageProcessorImpl::ReleaseBlock()
 
 void OTAImageProcessorImpl::FetchNextData(uint32_t context)
 {
-    CHIP_ERROR error      = CHIP_NO_ERROR;
     auto * imageProcessor = &OTAImageProcessorImpl::GetDefaultInstance();
     SystemLayer().ScheduleLambda([imageProcessor] {
         if (imageProcessor->mDownloader)

src/platform/nxp/k32w/k32w0/ConfigurationManagerImpl.cpp

@@ -276,8 +276,6 @@ CHIP_ERROR ConfigurationManagerImpl::DetermineBootReason(uint8_t rebootCause)
 
 void ConfigurationManagerImpl::DoFactoryReset(intptr_t arg)
 {
-    CHIP_ERROR err;
-
     ChipLogProgress(DeviceLayer, "Performing factory reset");
 
     K32WConfig::FactoryResetConfig();

src/platform/nxp/k32w/k32w0/RamStorage.cpp

@@ -70,8 +70,6 @@ CHIP_ERROR RamStorageKey::Delete()
 
 CHIP_ERROR RamStorage::Init(uint16_t aInitialSize, bool extendedSearch)
 {
-    CHIP_ERROR err;
-
     mBuffer         = getRamBuffer(mPdmId, aInitialSize, extendedSearch);
     mExtendedSearch = extendedSearch;
 

src/platform/nxp/k32w/k32w0/crypto/CHIPCryptoPALNXPUltrafastP256.cpp

@@ -665,7 +665,7 @@ CHIP_ERROR P256Keypair::Initialize(ECPKeyTarget key_target)
     }
     keypair      = nullptr;
     mInitialized = true;
-exit:
+
     _log_mbedTLS_error(result);
     return error;
 }
@@ -929,8 +929,6 @@ CHIP_ERROR Spake2p_P256_SHA256_HKDF_HMAC::FEGenerate(void * fe)
 
     result = ECP256_GenerateKeyPair(&PublicKey, &PrivateKey, NULL);
 
-    Spake2p_Context * context = to_inner_spake2p_context(&mSpake2pContext);
-
     VerifyOrExit(result == gSecEcp256Success_c, error = CHIP_ERROR_INTERNAL);
 
     ecp_coordinate_copy((uint8_t *) fe, (const uint8_t *) &PrivateKey);
@@ -1040,7 +1038,6 @@ CHIP_ERROR Spake2p_P256_SHA256_HKDF_HMAC::ComputeL(uint8_t * Lout, size_t * L_le
         memcpy(p, (uint8_t *) &gen_point, SEC_ECP256_COORDINATE_LEN * 2);
     } while (0);
 
-exit:
     _log_mbedTLS_error(result);
     return error;
 }