remove unused import from numeric tests

Author: syurkevi

arrayfire_wrapper/lib/mathematical_functions/numeric_functions.py

@@ -3,7 +3,6 @@
 import arrayfire_wrapper.dtypes as dtype
 import arrayfire_wrapper.lib as wrapper
 from arrayfire_wrapper.defines import AFArray
-from arrayfire_wrapper.dtypes import float32
 from arrayfire_wrapper.lib._utility import binary_op, call_from_clib, unary_op
 from arrayfire_wrapper.lib.create_and_modify_array.create_array import create_constant_array
 from arrayfire_wrapper.lib.mathematical_functions.arithmetic_operations import sub