Remove output-format=mlir-ir flag for iree-compile

As the issue in https://github.com/iree-org/iree/issues/10405 has been
fixed, we can remove the output-format=mlir-ir flag for iree-compile.
The mlir file size with this change is significiantly smaller.

Change-Id: I54c00a7f409ba78ada7b151f4d63259e5af287e8

cmake/springbok_static_module.cmake

diff --git a/cmake/springbok_static_module.cmake b/cmake/springbok_static_module.cmake
index b7295bb..2fd6b45 100644
--- a/cmake/springbok_static_module.cmake
+++ b/cmake/springbok_static_module.cmake
@@ -51,7 +51,6 @@
     set(_MLIR_SRC "${CMAKE_CURRENT_BINARY_DIR}/${_RULE_NAME}.mlir")
     get_filename_component(_SRC_PATH "${_RULE_SRC}" REALPATH)
     set(_ARGS "${_SRC_PATH}")
-    list(APPEND _ARGS "--output-format=mlir-ir")
     list(APPEND _ARGS "-o")
     list(APPEND _ARGS "${_RULE_NAME}.mlir")
     # Only add the custom_command here. The output is passed to

cmake/springbok_vmvx_module.cmake

diff --git a/cmake/springbok_vmvx_module.cmake b/cmake/springbok_vmvx_module.cmake
index e63b583..5487e94 100644
--- a/cmake/springbok_vmvx_module.cmake
+++ b/cmake/springbok_vmvx_module.cmake
@@ -48,7 +48,6 @@
     set(_MLIR_SRC "${CMAKE_CURRENT_BINARY_DIR}/${_RULE_NAME}.mlir")
     get_filename_component(_SRC_PATH "${_RULE_SRC}" REALPATH)
     set(_ARGS "${_SRC_PATH}")
-    list(APPEND _ARGS "--output-format=mlir-ir")
     list(APPEND _ARGS "-o")
     list(APPEND _ARGS "${_RULE_NAME}.mlir")
     # Only add the custom_command here. The output is passed to