Remove unused TensorRT code (#12147)

Removing some python code that isn't in the current TensorRT execution paths.
This should make the code more readable and avoid potential linting errors.

Thanks to @vandanavk for pointing out the dead code and @cclauss for a quick
alternative fix.

Co-authored-by: Vandana Kannan <vandanavk@users.noreply.github.com>
Co-authored-by: cclauss <cclauss@bluewin.ch>

python/mxnet/base.py

@@ -729,19 +729,3 @@ def write_all_str(module_file, module_all_list):
     module_op_file.close()
     write_all_str(module_internal_file, module_internal_all)
     module_internal_file.close()
-
-def cint(init_val=0):
-    """create a C int with an optional initial value"""
-    return C.c_int(init_val)
-
-def int_addr(x):
-    """given a c_int, return it's address as an int ptr"""
-    x_addr = C.addressof(x)
-    int_p = C.POINTER(C.c_int)
-    x_int_addr = C.cast(x_addr, int_p)
-    return x_int_addr
-
-def checked_call(f, *args):
-    """call a cuda function and check for success"""
-    error_t = f(*args)
-    assert error_t == 0, "Failing cuda call %s returns %s." % (f.__name__, error_t)

tests/python/tensorrt/common.py

@@ -15,7 +15,6 @@
 # specific language governing permissions and limitations
 # under the License.
 
-import os
 from ctypes.util import find_library
 
 
@@ -29,11 +28,3 @@ def merge_dicts(*dict_args):
     for dictionary in dict_args:
         result.update(dictionary)
     return result
-
-
-def get_fp16_infer_for_fp16_graph():
-    return int(os.environ.get("MXNET_TENSORRT_USE_FP16_FOR_FP32", 0))
-
-
-def set_fp16_infer_for_fp16_graph(status=False):
-    os.environ["MXNET_TENSORRT_USE_FP16_FOR_FP32"] = str(int(status))