Remove duplicated source

Author: kou

cpp/src/arrow/CMakeLists.txt

@@ -780,7 +780,6 @@ if(ARROW_COMPUTE)
        compute/kernels/scalar_temporal_binary.cc
        compute/kernels/scalar_temporal_unary.cc
        compute/kernels/scalar_validity.cc
-       compute/kernels/temporal_internal.cc
        compute/kernels/util_internal.cc
        compute/kernels/vector_array_sort.cc
        compute/kernels/vector_cumulative_ops.cc

cpp/src/arrow/meson.build

@@ -525,7 +525,6 @@ if needs_compute
         'compute/kernels/scalar_temporal_binary.cc',
         'compute/kernels/scalar_temporal_unary.cc',
         'compute/kernels/scalar_validity.cc',
-        'compute/kernels/temporal_internal.cc',
         'compute/kernels/util_internal.cc',
         'compute/kernels/vector_array_sort.cc',
         'compute/kernels/vector_cumulative_ops.cc',