sw/vec_iree: remove some no-warning flags for GCC compilation

Remove some no longer needd no-warning flags for GCC compilation

Change-Id: Ifa399e90bcc21c76ed332a2c3dda71812224a628

cmake/riscv_iree_gcc.cmake

diff --git a/cmake/riscv_iree_gcc.cmake b/cmake/riscv_iree_gcc.cmake
index 28c8851..c1d34e1 100644
--- a/cmake/riscv_iree_gcc.cmake
+++ b/cmake/riscv_iree_gcc.cmake
@@ -53,10 +53,7 @@
   "-L${RISCV_TOOLCHAIN_ROOT}/riscv32-unknown-elf/lib/newlib-nano/ -specs=nano.specs"
 )
 
-# TODO(lundong): Move no_warning_flags to IREE code base
-set(C_NO_WARNING_FLAGS "-Wno-char-subscripts -Wno-format -Wno-incompatible-pointer-types -Wno-int-to-pointer-cast -Wno-pointer-to-int-cast")
-
-set(CMAKE_C_FLAGS             "${RISCV_COMPILER_FLAGS} ${CMAKE_C_FLAGS} ${C_NO_WARNING_FLAGS}")
+set(CMAKE_C_FLAGS             "${RISCV_COMPILER_FLAGS} ${CMAKE_C_FLAGS} -Wno-char-subscripts -Wno-format")
 set(CMAKE_CXX_FLAGS           "${RISCV_COMPILER_FLAGS} ${RISCV_COMPILER_FLAGS_CXX} ${CMAKE_CXX_FLAGS}")
 set(CMAKE_ASM_FLAGS           "${RISCV_COMPILER_FLAGS} ${CMAKE_ASM_FLAGS}")
 set(CMAKE_C_FLAGS_DEBUG       "${RISCV_COMPILER_FLAGS_DEBUG} ${CMAKE_C_FLAGS_DEBUG}")