[nrf toup] Remove redundant nosys.specs

The obsolete nosys.spec is no more needed with the new Zephyr
version.

Signed-off-by: Arkadiusz Balys <arkadiusz.balys@nordicsemi.no>

Author: ArekBalysNordic

config/nrfconnect/chip-module/CMakeLists.txt

@@ -59,10 +59,6 @@ if (CHIP_CFLAGS)
     matter_add_flags("${CHIP_CFLAGS}")
 endif()
 
-if (CONFIG_ARM)
-    matter_add_cflags(--specs=nosys.specs)
-endif()
-
 if (CONFIG_NRF_SECURITY)
     zephyr_include_directories($<TARGET_PROPERTY:mbedtls_external,INTERFACE_INCLUDE_DIRECTORIES>)